We are west-coasters, so our experience is pretty limited. That said, we had a fun time in Chincoteague a few years ago. The mosquitos were pretty horrendous so hiking got axed, but the beach was nice and it was fun to see the wild ponies, and the town was cute with some typical beach holiday ice cream shops and t-shirt shops. We weren’t there a full week… only about 3 or 4 nights.