I agree with rklein001's suggestion of Newport. Newport center is easy to walk and there are a number of good restaurants. If you are looking for a quiet timeshare, I would recommend the Wellington which is located at the south end of Thames St., away from the hustle and bustle of Newport center; but still an easy walk to the center. The unit includes a fireplace but do not have full kitchens. I do not know who the Wellington is affiliated with,
You could fly into TF Green State Airport located in Warwick RI which is on the west side of Narragansett Bay, about 28 miles from Newport.
One thing I have to add is that Newport in the winter can be very cold when the wind is off the harbor. The times I have visited Newport in the winter that cold wind cut right through my normal winter coat, brrrrrrrrrr.
If you are only interested in relaxing, Newport is the place to be; but Boston has much, much more to offer.
SBtS