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                                                                   EXHIBIT 10.66

                                                                  EXECUTION COPY

                            SERIES 2002-1 SUPPLEMENT
                           Dated as of August 29, 2002

                                       to

                         MASTER LOAN PURCHASE AGREEMENT
                           Dated as of August 29, 2002

- --------------------------------------------------------------------------------
                     SIERRA RECEIVABLES FUNDING COMPANY, LLC
                                   LOAN-BACKED
                             VARIABLE FUNDING NOTES,
                                  SERIES 2002-1
- --------------------------------------------------------------------------------

                                 by and between

                            TRENDWEST RESORTS, INC.,
                                    as Seller

                                       and

                          SIERRA DEPOSIT COMPANY, LLC,
                                  as Purchaser

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                                TABLE OF CONTENTS
<Table>
<Caption>
                                                                                               PAGE
                                                                                               ----
                                                                                            
Section 1.      Definitions.....................................................................1

Section 2.      Sale............................................................................5

       (a)      Series 2002-1 Loans.............................................................5

       (b)      Filing of Financing Statements..................................................5

       (c)      Delivery of Series 2002-1 Loan Schedule.........................................6

       (d)      Purchase of Additional Series 2002-1 Loans......................................6

       (e)      Treatment as Sale...............................................................7

       (f)      Recharacterization..............................................................7

       (g)      Security Interest in Transferred Assets.........................................7

       (h)      Transfer of Loans...............................................................7

Section 3.      Purchase Price..................................................................8

Section 4.      Payment of Purchase Price.......................................................8

Section 5.      Conditions Precedent to Sale of Series 2002-1 Loans and Additional Loans........8

       (a)      Conditions Precedent to Sale of Series 2002-1 Loans.............................8

       (b)      Conditions Precedent to Sale of Additional Loans................................8

Section 6.      Representations and Warranties of the Seller....................................9

       (a)      Representations and Warranties of the Seller....................................9

       (b)      Representations and Warranties Regarding the Series 2002-1 Loans...............10

Section 7.      Repurchases or Substitution of Series 2002-1 Loans.............................10

       (a)      Repurchase or Substitution Obligation..........................................10

       (b)      Repurchases and Substitutions..................................................11

       (c)      Repurchases of Series 2002-1 Loans that Become Defaulted Loans.................12

       (d)      Maximum Repurchases............................................................12

Section 8.      Covenants of the Seller........................................................12

Section 9.      Representations and Warranties of the Company..................................13

Section 10.     Covenants of the Company.......................................................13

Section 11.     Miscellaneous Provisions.......................................................13

       (k)      Ratification of Agreement......................................................13

       (l)      Amendment......................................................................13
</Table>

                                       -i-
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<Table>
                                                                                            
       (m)      Counterparts...................................................................13

       (n)      GOVERNING LAW..................................................................13

       (o)      Successors and Assigns.........................................................13
</Table>

                                      -ii-
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     THIS PURCHASE AGREEMENT SUPPLEMENT (this "PA SUPPLEMENT"), dated as of
August 29, 2002, is by and between TRENDWEST RESORTS, INC., an Oregon
corporation, as seller (the "SELLER") and SIERRA DEPOSIT COMPANY, LLC, a
Delaware limited liability company, as purchaser (hereinafter referred to as the
"PURCHASER" or the "COMPANY").

     Section 2 of the Agreement provides that the Seller may from time to time
sell and assign to the Company, and the Company may from time to time Purchase
from the Seller, all the Seller's right, title and interest in, to and under
Loans listed on the Loan Schedule of the related PA Supplement on the Closing
Date for the related Series. The principal terms of the Purchase and sale of
Loans for each Series shall be set forth in a PA Supplement to the Agreement.

     Pursuant to this PA Supplement and in accordance with Section 2 of the
Agreement, the Seller hereby sells to the Company, and the Company hereby
Purchases from the Seller, the Series 2002-1 Loans and the Seller and the
Company hereby specify the principal terms of such sales and Purchases.

     SECTION 1. DEFINITIONS.

     All capitalized terms used herein and not otherwise defined herein have the
meanings ascribed to them in the Agreement. Each capitalized term defined herein
shall relate only to the Series 2002-1 Loans and to no other Loans purchased by
the Company from the Seller.

     In the event that any term or provision contained herein shall conflict
with or be inconsistent with any term or provision contained in the Agreement,
the terms and provisions of this PA Supplement shall be controlling.

     The words "hereof," "herein" and "hereunder" and words of similar import
when used in this PA Supplement shall refer to this PA Supplement as a whole and
not to any particular provision of this PA Supplement; and Article, Section,
subsection, Schedule and Exhibit references contained in this PA Supplement are
references to Articles, Sections, subsections, Schedules and Exhibits in or to
this PA Supplement unless otherwise specified.

     "ADDITION DATE" shall mean the date from and after which Additional Loans
are sold pursuant to Section 2(d).

     "AGREEMENT" shall mean the Master Loan Purchase Agreement dated as of
August 29, 2002 by and between the Seller and the Purchaser, as the same may be
amended, supplemented or otherwise modified from time to time thereafter in
accordance with its terms.

     "ASSIGNMENT" shall have the meaning set forth in Section 2(d)(iii)(E).

     "CLOSING DATE" shall mean August 29, 2002.

     "COMPANY" shall have the meaning set forth in the preamble.

     "CUT-OFF DATE" shall mean August 27, 2002.

     "ELIGIBLE LOAN" shall mean a Series 2002-1 Loan:

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     (a)  with respect to which (i) the related Timeshare Property is not a Lot,
          (ii) the related Timeshare Property has been purchased by an Obligor,
          (iii) except in the case of a Green Loan, a certificate of occupancy
          for the related Timeshare Property has been issued, (iv) except in the
          case of a Green Loan, the unit for the related Timeshare Property is
          complete and ready for occupancy, is not in need of material
          maintenance or repair, except for ordinary, routine maintenance and
          repairs that are not substantial in nature or cost and contains no
          structural defects materially affecting its value, (v) the related
          Timeshare Property Regime is not in need of maintenance or repair,
          except for ordinary, routine maintenance and repairs that are not
          substantial in nature or cost and contains no structural defects
          materially affecting its value, (vi) there is no legal, judicial or
          administrative proceeding pending, or to the Seller's knowledge
          threatened, for the total condemnation of the related Timeshare
          Property or partial condemnation of any portion of the related
          Timeshare Property Regime that would have a material adverse effect on
          the value of the related Timeshare Property and (vii) the related
          Timeshare Property, if not Vacation Credits, is not related to a
          Resort located outside of the United States, Canada, Mexico or the
          United States Virgin Islands;

     (b)  with respect to which the rights of the Obligor thereunder are subject
          to declarations, covenants and restrictions of record affecting the
          Resort;

     (c)  in the case of a Series 2002-1 Loan that is an Installment
          Contract, with respect to which the Seller has a valid ownership or
          security interest in an underlying Timeshare Property, subject only to
          Permitted Encumbrances, unless the criteria in paragraph (d) are
          satisfied;

     (d)  with respect to which (i) if the related Timeshare Property has been
          deeded to the Obligor of the related Series 2002-1 Loan, (A) the
          Seller has a valid and enforceable first lien Mortgage on such
          Timeshare Property, except as such enforceability may be limited by
          Debtor Relief Laws and as such enforceability may be limited by
          general principles of equity, regardless of whether such
          enforceability is considered in a proceeding in equity or at law, (B)
          such Mortgage and related mortgage note have been assigned to the
          Collateral Agent, (C) such Mortgage and the related note for such
          Mortgage have been transferred to the custody of the Custodian in
          accordance with the provisions of Section 6(c)(i) of the Agreement and
          (D) if any Mortgage relating to such Series 2002-1 Loan is a deed of
          trust, a trustee duly qualified under applicable law to serve as such
          has been properly designated in accordance with applicable law and
          currently so serves or (ii) if the related Timeshare Property has not
          been deeded to the Obligor of the related Series 2002-1 Loan, the
          Seller has legal title to and an equitable interest in such Timeshare
          Property underlying the related Series 2002-1 Loan;

     (e)  that was issued in a transaction that complied, and is in compliance,
          in all material respects with all material requirements of applicable
          federal, state and local law;

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     (f)  that requires the Obligor to pay the unpaid principal balance over an
          original term of not greater than 120 months and (ii) the original
          term of which does not exceed 84 months unless (A) the Series 2002-1
          Loan relates to a Timeshare Upgrade or (B) the weighted average FICO
          score of all such Series 2002-1 Loans with original terms longer than
          84 months is at least 640 and the Series 2002-1 Loan has a FICO score
          not less than 600;

     (g)  the Scheduled Payments on which are denominated and payable in United
          States dollars;

     (h)  that is not a Defective Loan or a Defaulted Loan;

     (i)  that is not a Delinquent Loan and has never been a Defaulted Loan, as
          of the Cut-Off Date or related Addition Cut-Off Date, as applicable;

     (j)  that does not (i) finance the purchase of credit life   insurance and
          (ii) finance, and was not originated in connection with, the
          "Explorer" program, unless such Loan has been converted to be in
          connection with the WorldMark program;

     (k)  with respect to which no Due Date thereunder occurring after
          the Cut-Off Date or the related Addition Cut-Off Date, as
          applicable, has been deferred;

     (l)  with respect to which the related Timeshare Property consists of
          Vacation Credits or a UDI;

     (m)  that was originated by the Seller and has been consistently serviced
          by the Seller, in each case in the ordinary course of its business and
          in accordance with the Seller's Customary Practices and Credit
          Standards and Collection Policies;

     (n)  that has not been specifically reserved against by the Seller or
          classified by the Seller as uncollectible or charged off;

     (o)  that arises from transactions in a jurisdiction in which the Seller is
          duly qualified to do business, except where the failure to so qualify
          will not adversely affect or impair the legality, validity, binding
          effect and enforceability of such Series 2002-1 Loan;

     (p)  that has not been cancelled or terminated by the related Obligor
          (regardless of whether such Obligor is legally entitled to do so) and
          constitutes a legal, valid, binding and enforceable obligation of the
          related Obligor, except as such enforceability may be limited by
          Debtor Relief Laws and as such enforceability may be limited by
          general principles of equity, regardless of whether such
          enforceability is considered in a proceeding in equity or at law;

     (q)  that is fully amortizing pursuant to a required schedule of
          substantially equal monthly payments of principal and interest;

                                        3
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     (r)  with respect to which (i) the downpayment has been made and (ii) no
          statutory rescission rights with respect to the related Obligor are
          continuing as of the Cut-Off Date or related Addition Cut-Off Date, as
          applicable;

     (s)  that had an Equity Percentage of 10% or more at the time of the sale
          of the related Timeshare Property to the related Obligor (or, in the
          case of a Loan relating to a Timeshare Upgrade, an Equity Percentage
          of 10% or more of the value of all vacation credits owned by the
          related Obligor);

     (t)  with respect to which the related Obligor has not at any time made a
          written request for rescission of such Series 2002-1 Loan or otherwise
          stated in writing that it does not intend to consummate such Loan or
          to fully perform under such Series 2002-1 Loan;

     (u)  with respect to which at least one Scheduled Payment has been made by
          the Obligor;

     (v)  as of the Cut-Off Date or related Addition Cut-Off Date, as
          applicable, has an outstanding loan balance not greater than $100,000;
          and

     (w)  that, in the case of a Green Loan, (i) satisfies each of the
          eligibility criteria set forth in paragraphs (a) through (v) above
          other than any such criteria that cannot be satisfied due solely to
          (A) the related Green Timeshare Property being located in a Resort
          that is not yet complete and ready for occupancy; (B) the Seller not
          having a valid ownership interest in the related Green Timeshare
          Property; or (C) the related Green Timeshare Property not having been
          deeded to the Obligor or legal title not being held by the Nominee;
          and (ii) the related Green Timeshare Property has a scheduled
          completion date no more than six months following the Cut-Off Date or
          related Addition Cut-Off Date, as applicable.

     "EXCESS CONCENTRATION AMOUNT" shall have the meaning set forth in the
Series 2002-1 Supplement.

     "PA SUPPLEMENT" shall have the meaning set forth in the preamble.

     "POOL PURCHASE PRICE" shall have the meaning set forth in Section 3.

     "PURCHASE" shall have the meaning set forth in Section 2(e).

     "PURCHASER" shall have the meaning set forth in the preamble.

     "REPURCHASE DATE" shall have the meaning set forth in Section 7.

     "REPURCHASE PRICE" shall have the meaning set forth in Section 7.

                                        4
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     "SERIES TERMINATION DATE" shall mean the date on which all obligations with
respect to the Series 2002-1 Notes issued under the Series 2002-1 Supplement
have been paid in full and the Series 2002-1 Supplement is discharged.

     "SERIES 2002-1 ADDITIONAL LOAN" shall mean each Additional Loan
constituting one of the Series 2002-1 Loans Purchased from the Seller on an
Addition Cut-Off Date and listed on Schedule 1 to the related Assignment.

     "SERIES 2002-1 LOAN" shall mean each Loan listed from time to time on the
Series 2002-1 Loan Schedule.

     "SERIES 2002-1 LOAN SCHEDULE" shall mean the Loan Schedule for the Series
2002-1 Loans.

     "SERIES 2002-1 NOTEHOLDER" shall mean any Noteholder under the Series
2002-1 Supplement.

     "SERIES 2002-1 PLEDGED LOAN" shall have the meaning set forth in the Series
2002-1 Supplement.

     "SERIES 2002-1 SUPPLEMENT" shall mean the supplement to the Master
Indenture and Servicing Agreement executed and delivered in connection with the
original issuance of the Series 2002-1 Notes and all amendments thereof and
supplements thereto.

     "SUBSTITUTION ADJUSTMENT AMOUNT" shall have the meaning set forth in
Section 7.

     SECTION 2. SALE.

            (a) SERIES 2002-1 LOANS. Subject to the terms and conditions and in
reliance on the representations, warranties, and covenants and agreements set
forth in the Agreement and this PA Supplement, the Seller hereby sells and
assigns to the Company, and the Company hereby Purchases from the Seller,
without recourse except as specifically set forth herein, all of the Seller's
right, title and interest in, to and under the Initial Loans, if any, listed on
the Series 2002-1 Loan Schedule delivered on the Closing Date, together with all
Transferred Assets relating thereto. The Series 2002-1 Additional Loans existing
at the close of business on the related Addition Cut-Off Date and all other
Transferred Assets relating thereto shall be sold by the Seller and purchased by
the Company on the related Addition Date. Notwithstanding the foregoing, and for
avoidance of doubt, the Seller does not assign, and the Purchaser does not agree
to assume, any obligations specific to the Seller as developer of any Timeshare
Property underlying an Installment Contract.

            (b) FILING OF FINANCING STATEMENTS. In connection with the foregoing
sale, the Seller agrees to record and file a financing statement or statements
(and continuation statements or other amendments with respect to such financing
statements) with respect to the Series 2002-1 Loans and related Transferred
Assets described in Section 2(a) sold by the Seller hereunder meeting the
requirements of applicable state law in such manner and in such jurisdictions as
are necessary to perfect the interests of the Purchaser created hereby under the
applicable UCC and

                                        5
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to deliver a file-stamped copy of such financing statements and continuation
statements (or other amendments) or other evidence of such filings to the
Purchaser.

            (c) DELIVERY OF SERIES 2002-1 LOAN SCHEDULE. In connection with the
sale and conveyance hereunder, the Seller agrees on or prior to the Closing Date
and on or prior to the applicable Addition Date (in the case of Additional
Series 2002-1 Loans) to indicate or cause to be indicated clearly and
unambiguously in its accounting, computer and other records that the Series
2002-1 Loans and related Transferred Assets have been sold to the Purchaser
pursuant to this PA Supplement. In addition, in connection with the sale and
conveyance hereunder, the Seller agrees on or prior to the Closing Date and on
or prior to the applicable Addition Date (in the case of Additional Series
2002-1 Loans) to deliver to the Company a Series 2002-1 Loan Schedule for such
Series 2002-1 Loans or Additional Series 2002-1 Loans.

            (d) PURCHASE OF ADDITIONAL SERIES 2002-1 LOANS.

                    (i)   [Reserved].

                    (ii)  The Seller may, with the consent of the Purchaser,
     designate Eligible Loans to be sold as Additional Series 2002-1 Loans.

                    (iii) On the Addition Date with respect to any Additional
     Series 2002-1 Loans, such Additional Series 2002-1 Loans shall become
     Series 2002-1 Loans, and the Purchaser shall Purchase the Seller's right,
     title and interest in, to and under the Additional Series 2002-1 Loans and
     the other related Transferred Assets as provided in the Assignment, subject
     to the satisfaction of the following conditions on such Addition Date:

                    (A)   The Seller shall have delivered to the Purchaser
            copies of UCC financing statements covering such Additional Series
            2002-1 Loans, if necessary to perfect the Purchaser's first priority
            interest in such Series 2002-1 Additional Loans and the other
            related Transferred Assets;

                    (B)   On each of the Addition Cut-Off Date and the Addition
            Date, the sale of such Additional Series 2002-1 Loans and the other
            related Transferred Assets to the Purchaser shall not have caused
            the Seller's insolvency or have been made in contemplation of the
            Seller's insolvency;

                    (C)   No selection procedure shall have been utilized by the
            Seller that would result in a selection of such Additional Series
            2002-1 Loans (from the Eligible Loans available to the Seller) that
            would be materially adverse to the interests of the Purchaser as of
            the Addition Date;

                    (D)   The Seller shall have indicated in its accounting,
            computer and other records that the Additional Series 2002-1 Loans
            and the other related Transferred Assets have been sold to the
            Purchaser and shall have delivered to the Purchaser the required
            Series 2002-1 Loan Schedule;

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                    (E)   The Seller and the Purchaser shall have entered into a
            duly executed, written assignment substantially in the form of
            Exhibit B to the Agreement (an "ASSIGNMENT");

                    (F)   The Seller shall have delivered to the Purchaser an
            Officer's Certificate of the Seller dated the Addition Date,
            confirming, to the extent applicable, the items set forth in Section
            2(d)(iii) (A) through (E);

                    (G)   The Seller shall have executed the letter agreement
            relating to the amendment of documents and the letter agreement
            relating to inspections and audits which agreements were entered
            into by Fairfield Acceptance Corporation, the Purchaser and Sierra
            Receivables Funding Company, LLC on the date of this PA Supplement;
            and

                    (H)   The Purchaser shall have paid the Additional Pool
            Purchase Price as provided in Section 3 of the Agreement.

                    (iv)  The Seller shall have no obligation to sell the
     Additional Series 2002-1 Loans if it has not been paid the Additional Pool
     Purchase Price therefor.

            (e) TREATMENT AS SALE. It is the express and specific intent of
the parties that the sale of the Series 2002-1 Loans and related Transferred
Assets from the Seller to the Company as provided in this Section 2 (the
"PURCHASE") is and shall be construed for all purposes as a true and absolute
sale of such Series 2002-1 Loans and related Transferred Assets, shall be
absolute and irrevocable and provide the Company with the full benefits of
ownership of the Series 2002-1 Loans and related Transferred Assets and will be
treated as such for all federal income tax reporting and all other purposes.

            (f) RECHARACTERIZATION. Without prejudice to the provisions of
Section 2(e) providing for the absolute transfer of the Seller's interest in the
Series 2002-1 Loans and related Transferred Assets to the Company in order to
secure the prompt payment and performance of all of the obligations of the
Seller to the Company and the Company's assignees arising in connection with the
Agreement, this PA Supplement and the other Facility Documents, whether now or
hereafter existing, due or to become due, direct or indirect, or absolute or
contingent, the Seller hereby assigns and grants to the Company a first priority
security interest in all of the Seller's right, title and interest, whether now
owned or hereafter acquired, if any, in, to and under all of the Series 2002-1
Loans and related Transferred Assets and the proceeds thereof.

            (g) SECURITY INTEREST IN TRANSFERRED ASSETS. The Seller
Sacknowledges that the Series 2002-1 Loans and related Transferred Assets are
subject to the Lien of the Indenture and Servicing Agreement for the benefit of
the Trustee and the Series 2002-1 Noteholders (or to the Collateral Agent on
behalf of the Trustee and the Series 2002-1 Noteholders).

            (h) TRANSFER OF LOANS. All Series 2002-1 Loans conveyed to the
Company hereunder shall be held by the Custodian pursuant to the terms of the
Custodial Agreement for the benefit of the Company, the Issuer, the Trustee and
the Collateral Agent. Upon each Purchase hereunder, the Custodian shall execute
and deliver to the Company a certificate

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acknowledging receipt of the applicable Series 2002-1 Loans pursuant to the
Custodial Agreement.

     The Seller acknowledges that the Company will convey the Series 2002-1
Loans and the other related Transferred Assets to the Issuer and that the Issuer
will grant a security interest in the Series 2002-1 Loans and other related
Transferred Assets to the Collateral Agent pursuant to the Indenture and
Servicing Agreement and the related Series 2002-1 Supplement. The Seller agrees
that, upon such grant, the Issuer, the Trustee and the Collateral Agent may
enforce all of the Seller's obligations hereunder and under the Agreement
directly, including without limitation the repurchase obligations of the Seller
set forth in Section 7.

     SECTION 3. PURCHASE PRICE.

     No Series 2002-1 Loans shall be sold on the Closing Date. The purchase
price for Additional Loans sold on an Addition Date shall be the Additional Pool
Purchase Price.

     SECTION 4. PAYMENT OF PURCHASE PRICE.

     Sections 4(a) through (c) are set forth in the Agreement.

     (d)    The closing shall take place at the offices of Orrick, Herrington &
Sutcliffe LLP, Washington Harbour, 3050 K Street, NW, Washington, D.C. 20007, at
10:00 a.m. local time on the Closing Date, or such other time and place as shall
be mutually agreed upon among the parties hereto.

     SECTION 5. CONDITIONS PRECEDENT TO SALE OF SERIES 2002-1 LOANS AND
ADDITIONAL LOANS.

     (a)    CONDITIONS PRECEDENT TO SALE OF SERIES 2002-1 LOANS. The Purchaser's
obligations hereunder to Purchase and pay for the Series 2002-1 Loans and
related Transferred Assets are subject to the fulfillment of the following
conditions on or before the Closing Date:

            (i)   (A) The Purchaser shall have received the Series 2002-1 Pool
                  Purchase Agreement relating to each Series 2002-1 Loan
                  executed by all the parties thereto and (B) all conditions
                  precedent to the sale of the Series 2002-1 Pool Loans
                  thereunder shall have been fulfilled to the extent they are
                  capable of being fulfilled prior to the performance by the
                  Purchaser of its obligations under this PA Supplement.

            (ii)  The representations and warranties of the Seller made in the
                  Agreement and herein shall be true and correct in all material
                  respects on the Closing Date.

     (b)    CONDITIONS PRECEDENT TO SALE OF ADDITIONAL LOANS. No Purchase of
Additional Loans and related Transferred Assets may be made hereunder until the
Purchaser shall have received each of the following in form and substance
acceptable to the Purchaser:

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            (i)   Copies of search reports certified by parties acceptable to
     the Purchaser dated a date reasonably prior to the initial Addition Date
     (A) listing all effective financing statements which name the Seller (under
     its present name and any previous names) as debtor or seller and which are
     filed with respect to the Seller in each relevant jurisdiction, together
     with copies of such financing statements (none of which shall cover any
     portion of the Series 2002-1 Loans being purchased from the Seller and
     related Transferred Assets except as contemplated by the Facility
     Documents);

            (ii)  Copies of proper UCC Financing Statement Amendments (Form
     UCC3), if any, necessary to terminate all security interests and other
     rights of any Person in the Series 2002-1 Loans being purchased from the
     Seller and related Transferred Assets previously granted by the Seller
     (except as contemplated by the Facility Documents);

            (iii) Copies of proper UCC Financing Statements (Form UCC1) naming
     the Seller as debtor or seller of the Series 2002-1 Loans being purchased
     from the Seller and related Transferred Assets, the Issuer as total
     assignee and the Purchaser as assignor secured party, and such other
     similar instruments or documents with respect to the Seller as may be
     necessary or in the opinion of the Purchaser desirable under the UCC of all
     appropriate jurisdictions or any comparable law to evidence the perfection
     of the Purchaser's interest in the Series 2002-1 Loans and related
     Transferred Assets;

            (iv)  An opinion or opinions of counsel to the Seller, in the form
     required by the Purchaser, with respect to the following: (A) certain
     security interest matters, and (B) "true sale" and substantive
     consolidation matters; and

            (v)   Evidence that one or more Lockbox Accounts have been
     established.

     SECTION 6. REPRESENTATIONS AND WARRANTIES OF THE SELLER.

            (a) REPRESENTATIONS AND WARRANTIES OF THE SELLER. The Seller
represents and warrants as of the Closing Date and as of each Addition Date, or
as of such other date specified in such representation and warranty, that:

                  (xvii) ACCURACY OF INFORMATION. All information with respect
     to the Seller and the Loans contained in the Confidential Information
     Memorandum dated June 2002 with respect to the Series 2002-1 Notes and
     Series 2002-1 Loans (including, without limitation, the Credit Standards
     and Collection Policy) was true and accurate in every respect material to
     the transactions contemplated hereby on the date as of which it was
     delivered, and did not omit to state any fact necessary to make the
     statements contained therein not materially misleading or, if any such
     information contained therein has been discovered to have been inaccurate
     on such date, such information has been corrected by subsequent information
     provided in writing to the Issuer.

                  (xviii) NO MATERIAL ADVERSE CHANGE. As of the Closing Date,
     there has been no material adverse change with respect to the business
     operations or financial condition of the Seller since December 31, 2001.

                                        9
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          Sections 6(a)(i) through (xvi) are set forth in the Agreement.

            (b) REPRESENTATIONS AND WARRANTIES REGARDING THE SERIES 2002-1
LOANS. The Seller represents and warrants to the Company as of the Cut-Off Date
and Addition Cut-Off Date as to each Series 2002-1 Loan conveyed on and as of
the Closing Date or the related Addition Date, as applicable (except as
otherwise expressly stated) as follows:

                  (xxiii) LOAN SCHEDULE. The information set forth in the Series
          2002-1 Loan Schedule is true and correct with respect to such Series
          2002-1 Loan.

                  (xxiv) GOOD TITLE TO SERIES 2002-1 LOANS. The Seller has good
          and marketable title to such Series 2002-1 Loan free and clear of any
          Lien other than Permitted Encumbrances. (A) With respect to the
          related Timeshare Property that consists of a Vacation Credit and the
          related Loan Documents, the Seller has not sold, assigned or pledged
          such related Series 2002-1 Loan or any interest therein to any Person
          other than the Company and (B) with respect to the related Timeshare
          Property that consists of an UDI, the Assignment of Mortgage of such
          related Mortgage from the Seller to the Company and each related
          endorsement of the related Mortgage note constitutes a duly executed,
          legal, valid, binding and enforceable sale, assignment or endorsement
          of such related Mortgage and related Mortgage note, and all monies due
          or to become due thereunder and all proceeds thereof.

                  (xxv) NO DEFAULTS. As of the Cut-Off Date or related Addition
          Cut-Off Date, as applicable, such Series 2002-1 Loan is not a
          Defaulted Loan and no event has occurred which, with the taking of any
          action or the expiration of any grace or cure period or both, would
          cause such Series 2002-1 Loan to be a Defaulted Loan. The Seller has
          not waived any such default, breach, violation or event permitting
          acceleration with respect to such Series 2002-1 Loan.

                  (xxvi) EQUAL INSTALLMENTS. Such Series 2002-1 Loan has a fixed
          Loan Rate and provides for substantially equal monthly payments that
          fully amortize the Series 2002-1 Loan over its term.

                  (xxvii) EXCESS CONCENTRATION AMOUNT. The Purchase of such
          Series 2002-1 Loan occurring on such Closing Date or Addition Date, as
          applicable, and the inclusion of such Series 2002-1 Loan as a Series
          2002-1 Pledged Loan pursuant to the Series 2002-1 Supplement to the
          Indenture and Servicing Agreement, does not cause an increase in the
          Excess Concentration Amount.

          Sections 6(b)(i) through (xxii) are set forth in the Agreement.

          SECTION 7. REPURCHASES OR SUBSTITUTION OF SERIES 2002-1 LOANS.

            (a) REPURCHASE OR SUBSTITUTION OBLIGATION. Subject to Section 7(b),
upon discovery by the Seller or upon written notice from the Company, the Issuer
or the Trustee that any Series 2002-1 Loan is a Defective Loan, the Seller
shall, within 90 days after the earlier of its discovery or receipt of notice
thereof, cure such Defective Loan in all material respects or

                                       10
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either (i) repurchase such Defective Loan from the Company or its assignee at
the Repurchase Price or (ii) substitute one or more Qualified Substitute Loans
for such Defective Loan. For purposes of this Agreement, the term "Repurchase
Price" shall mean an amount equal to the outstanding Principal Balance of such
Defective Loan as of the close of business on the Due Date immediately preceding
the Payment Date on which the repurchase is to be made, plus accrued but unpaid
interest thereon to the date of the repurchase. The Company hereby directs the
Seller, for so long as the Indenture and Servicing Agreement is in effect, to
make such payment on its behalf to the Collection Account pursuant to Section
7(b). The following defects with respect to documents in any Loan File, solely
to the extent they do not impair the validity or enforceability of the subject
document under applicable law, shall not be deemed to constitute a breach of the
representations and warranties contained in Section 6(b): misspellings of or
omissions of initials in names; name changes from divorce or marriage;
discrepancies as to payment dates in a Series 2002-1 Loan of no more than 30
days; discrepancies as to Scheduled Payments of no more than $5.00;
discrepancies as to origination dates of not more than 30 days; inclusion of
additional parties other than the primary Obligor not listed in the Master
Servicer's records or in the Series 2002-1 Loan Schedule and non-substantive
typographical errors and other non-substantive minor errors of a clerical or
administrative nature.

            (b) REPURCHASES AND SUBSTITUTIONS. The Seller shall provide written
notice to the Company of any repurchase pursuant to Section 7(a) not less than
two Business Days prior to the date on which such repurchase is to be effected,
specifying the Defective Loan and the Repurchase Price therefor. Upon the
repurchase of a Defective Loan pursuant to Section 7(a), the Seller shall
deposit the Repurchase Price in the Collection Account on behalf of the Company
no later than 12:00 noon, New York time, on the Payment Date on which such
repurchase is made (the "REPURCHASE DATE").

     If the Seller elects to substitute a Qualified Substitute Loan or Loans for
a Defective Loan pursuant to this Section 7(b), the Seller shall deliver such
Qualified Substitute Loan in the same manner as the other Series 2002-1 Loans
sold hereunder, including delivery of the applicable Loan Documents as required
pursuant to the Custodial Agreement and satisfaction of the same conditions with
respect to such Qualified Substitute Loan as to the Purchase of Additional Loans
set forth in Section 2(d)(iii). Payments due with respect to Qualified
Substitute Loans prior to the last day of the Due Period next preceding the date
of substitution shall not be property of the Company, but will be retained by
the Master Servicer and remitted by the Master Servicer to the Seller on the
next succeeding Payment Date. Scheduled Payments due on a Defective Loan prior
to the last day of the Due Period next preceding the date of substitution shall
be property of the Company, and after such last day of the Due Period next
preceding the date of substitution the Seller shall be entitled to retain all
Scheduled Payments due thereafter and other amounts received in respect of such
Defective Loan. The Seller shall cause the Master Servicer to deliver a schedule
of any Defective Loans so removed and Qualified Substitute Loans so substituted
to the Company and such schedule shall be an amendment to the Series 2002-1 Loan
Schedule. Upon such substitution, the Qualified Substitute Loan or Loans shall
be subject to the terms of this PA Supplement in all respects, the Seller shall
be deemed to have made the representations and warranties with respect to each
Qualified Substitute Loan set forth in Section 6(b) of the Agreement and this PA
Supplement and Section 6(c) of the Agreement, in each case as of the date of
substitution, and the Seller shall be deemed to have made a representation and
warranty that each Loan so substituted is an Qualified Substitute Loan as of the
date of substitution. The

                                       11
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Seller shall be obligated to repurchase or substitute for any Eligible
Substitute Loan as to which the Seller has breached the Seller's representations
and warranties in Section 6(b) to the same extent as for any other Series 2002-1
Loan, as provided herein. In connection with the substitution of one or more
Qualified Substitute Loans for one or more Defective Loans, the Master Servicer
shall determine the amount (such amount, a "SUBSTITUTION ADJUSTMENT AMOUNT"), if
any, by which the aggregate principal balance of all such Qualified Substitute
Loans as of the date of substitution is less than the aggregate principal
balance of all such Defective Loans (after application of the principal portion
of the Scheduled Payments due in the month of substitution that are to be
distributed to the Company in the month of substitution). The Seller shall
deposit the amount of such shortfall into the Collection Account in immediately
available funds on the date of substitution, without any reimbursement therefor.

     Upon each repurchase or substitution, the Company shall automatically and
without further action sell, transfer, assign, set over and otherwise convey to
the Seller, without recourse, representation or warranty, all of the Company's
right, title and interest in and to the related Defective Loan, the related
Timeshare Property, the Loan File relating thereto and any other related
Transferred Assets, all monies due or to become due with respect thereto and all
Collections with respect thereto (including payments received from Obligors from
and including the last day of the Due Period next preceding the date of
transfer, subject to the payment of any Substitution Adjustment Amount). The
Company shall execute such documents, releases and instruments of transfer or
assignment and take such other actions as shall reasonably be requested by the
Seller to effect the conveyance of such Defective Loan, the related Timeshare
Property and related Loan File pursuant to this Section 7(b).

     Promptly after the occurrence of a Repurchase Date and after the repurchase
of Defective Loans in respect of which the Repurchase Price has been paid on
such date, the Seller shall direct the Master Servicer to delete such Defective
Loans from the Series 2002-1 Loan Schedule.

     The obligation of the Seller to repurchase or substitute for any Defective
Loan shall constitute the sole remedy against the Seller with respect to any
breach of the representations and warranties set forth in Section 6(b) available
hereunder to the Company or its successors or assigns.

            (c) REPURCHASES OF SERIES 2002-1 LOANS THAT BECOME DEFAULTED LOANS.
If any Series 2002-1 Loan becomes a Defaulted Loan during any Due Period, the
Seller may repurchase such Defaulted Loan from the Company or its assignees at
the Repurchase Price therefor and in accordance with the additional provisions
applicable to repurchases of Defective Loans under Section 7(b).

            (d) MAXIMUM REPURCHASES. Notwithstanding anything to the contrary in
the Agreement or this PA Supplement, no Defaulted Loans shall be repurchased by
the Seller to the extent that the aggregate principal balance of all Defaulted
Loans so repurchased is greater than the Defaulted Loan Repurchase Cap.

     SECTION 8.  COVENANTS OF THE SELLER.

     Section 8 is set forth in the Agreement.

                                       12
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     SECTION 9.  REPRESENTATIONS AND WARRANTIES OF THE COMPANY.

     Section 9 is set forth in the Agreement.

     SECTION 10. COVENANTS OF THE COMPANY.

     Section 10 is set forth in the Agreement.

     SECTION 11. MISCELLANEOUS PROVISIONS.

     Sections 11(a) through (j) are set forth in the Agreement.

            (k) RATIFICATION OF AGREEMENT. As supplemented by this PA
Supplement, the Agreement is in all respects ratified and confirmed and the
Agreement as so supplemented by this PA Supplement shall be read, taken and
construed as one and the same instrument.

            (l) AMENDMENT. This PA Supplement may be amended from time to time
or the provisions hereof may be waived or otherwise modified by the parties
hereto by written agreement signed by the parties hereto.

            (m) COUNTERPARTS. This PA Supplement may be executed in two or more
counterparts, and by different parties on separate counterparts, each of which
shall be an original, but all of which shall constitute one and the same
instrument.

            (n) GOVERNING LAW. THIS PA SUPPLEMENT IS GOVERNED BY AND SHALL BE
CONSTRUED IN ACCORDANCE WITH THE LAWS OF THE STATE OF NEW YORK, INCLUDING
SECTION 5-1401 OF THE NEW YORK GENERAL OBLIGATIONS LAW, BUT OTHERWISE WITHOUT
REGARD TO CONFLICT OF LAWS PRINCIPLES.

            (o) SUCCESSORS AND ASSIGNS. This PA Supplement shall be binding upon
each of the Seller and the Company and their respective permitted successors and
assigns, and shall inure to the benefit of, and be enforceable by, each of the
Seller and the Company and each of the Issuer, the Trustee, the Collateral Agent
and the Noteholders.

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     IN WITNESS WHEREOF, the parties have caused their names to be signed hereto
by their respective officers thereunto duly authorized, all as of the day and
year first above written.

                                         TRENDWEST RESORTS, INC.

                                         By:    /s/ Timothy P. O'Neil
                                            ------------------------------------
                                             Name: Timothy P. O'Neil
                                             Title: Chief Financial Officer


                                         SIERRA DEPOSIT COMPANY, LLC

                                         By:    /s/ Ralph E. Turner
                                            ------------------------------------
                                             Name: Ralph E. Turner
                                             Title: President and Treasurer

                  [Signature page for Trendwest PA Supplement]