Hi and welcome back. We have stayed at Camden State Park in Maine, which sits up on a hill. You can do some hiking and get beautiful views of the ocean. The park is not far from Camden Maine, so you can take a quick drive into town for some "fancy" dining if you wish. Our family would definitely stay there again. We have also stayed at a private campground in Glen New Hampshire, about 45 minutes south of Mt. Washington, the windiest point (on top of the mt.) in the US. You can take a cog railway up to the top if the weather permits. Also of interest nearby is the hotel where the Bretton Woods agreement was signed establishing monetary policy between countries after World War II. I agree with the other posts encouraging you to make sure the campgrounds will be open, and book early.