Nick knows better than me, but I have been to the barbacue so many times that I can certainly say that there are a number of other entre offerings. It's a pretty expansive buffet.
As to your original question, there are lots to of great options if you want to either dingy or move your boat down to either Saba or Bitter End for the day and return to the dock at Leverick at night.
At that end of the sound, you have Saba, Bitter End - both have great bars. Biras is temporarily closed (we hope) and Fat Virgin is a great stop. I am also told that the mega yacht marina is a very friendly stop, well worth the effort.
Th best restaurant in North Sound is right at Leverick. The upstairs restaurant never disappoints.