Here's one you might want to consider that is definitely off the beaten path ... Happy Bay Beach. It's really beautiful, a very natural setting, but you need to bring your own stuff. There's a couple of ways to reach it if you don't have a boat, and they involve a 15 to 20 minute walk through the brush and trees. It's just west of Grand Case and kind of northeast from Friar's Bay. It's a nice break from the more populated beaches if you're looking for something different. Just an FYI.