Just a bit down the road is a lovely (still active) light house surrounded by a park with a small museum. There is a great crafts store in town as well as a well-appointed independent grocery store. Of course, lots of great seafood in the area! I highly recommend the ferry to Monhegan Island for a day trip.

If you are concerned about how shaded your spot will be you might wish to call the park directly and ask or perhaps use something like google earth to assess tree cover. Cellular data over Verizon Wireless was quite slow. The nearby St. Lawrence Seaway Visitors' Center and Eisenhower lock are a more interesting rainy day activity than I expected.