I checked with TravelGuard last year in response to some questions here, and here's what I was told.
As a
renter, TravelGuard will cover
all of your non-refundable out of pocket expenses for covered causes of cancellations and some other travel problems. Not all
travel insurance companies will insure timeshare vacations, but TravelGuard does.
The coverage for renters is
very different from what they offer for
DVC owners. The insured in that case is the renter...not the owner. The value of an owner's points is a nebulous thing, but the price a renter pays to an owner is finite and easy to prove. Travel insurance for a renter is really more like insuring a ski vacation where you pay everything up front, everything is non-refundable, and then something happens.
Be sure of two things before you make
any arrangements:
One -- be sure you clearly understand what they cover and what they don't.
And two -- be sure you understand the
deadlines for buying travel insurance
before you make any reservations. Often, you have to purchase
trip insurance within 14 days of making your
first reservation (be it airfare, DVC, etc), so it's important to know how that works to avoid having a large part of the trip not covered.