My family has just returned from a vacation in the Outer Banks of North Carolina (OBX). We rented a house within walking distance of the beach which included a pool, hot tub, plenty of bedrooms and bathrooms for everyone, and 4 outside decks to just hang out and read. We spent a lot of time at the beach, did some shopping, took in a few of the local attractions (like climbing to the top of a lighthouse, and kayaking the bay), but mostly we just enjoyed being together. Now that my children are grown, with children of their own, getting the whole family together is rare and all the more special.
If you are looking for a family oriented vacation, I highly recommend the OBX.