I have been around timeshares long enough to know what resort you mean and it is called Ocean Palms at the Westin to the right of Barony Beach. It is in the same lot as Royal Dunes and they have full use of Westin Hotel facilities which is to the left of Barony. At one time I thought Westin owned it outright but it may have changed ownership retaining use of facility rights.
The timeshare is fractional ownership I toured a unit last year and they plan a remodel soon. The unit I toured was tired but the location is nice. They are 2 and I though also had 3 bedrooms. I think may still have the map with a price sheet.
All you need to do is drive into the lot and there is normally a unit open with a sign. The management company is going to build on Daufauskie Island as well. We tried to also see a unit at Royal Dunes but they were fully booked on Columbus Day weekend.
We met someone who owned at OP and they love it there. Short walk to the beach.