ROCKY NECK STATE PARK. SALT ROCK CAMPGROUND. The Rocky Neck State Park Campground would be available for the 2020 period from might 22 through 6 (daily) september. Walk-in period: May 15 – May 21, September 6-October 11. 244 Western Principal Street (Path 156), Niantic 160 wooded and open internet sites. Concession, dumping station, restrooms, showers.