2 Retired wrote:
Liberty Harbor RV Park is the only place to go with your RV anywhere near the city. Just a parking lot with hookups, but it is very convenient. Very close to public transport into NYC or anywhere else in the area.
Floyd Bennett Field, part of Gateway National Recreation Area, is not just close to the city but actually in Brooklyn, and offers dry camping (and a dump station) for RVs as well as some pretty nice looking tent sites. There is a bus that runs to the entrance to the park, though not to the campground area specifically. Getting there with an RV is a bit of an adventure, and it would certainly not be as convenient as Liberty Harbor for seeing the Statue of Liberty and Ellis Island specifically. For seeing New York City more generally, though, it can be a valid option for some people, such as yours truly.