The unfortunate thing is that you owe $36K on something worth $2K at most. And from our experience, Wyndham doesn't have a good track record of accepting deed-backs. They would rather you just kept making payments.
If you default and let them foreclose, you will be turned over to collection, barred from using the TS. Unable to sell or give it away while it's in arrears. Ultimately your name will be removed from it, but not without a serious hit on your credit score. You can write a rebuttal letter for the credit agencies, and there have been discussions of the effect of a timeshare foreclosure. It may not be bad, but if you are going to be buying a home or changing employment sometime in the next 5-7 years, defaulting may not be the wisest move. If not, who knows?
Best wishes.
Jim