I've spent 4 nights in early november of 07 at the Liberty Harbor. This campground is similar to a parking lot with water and electric and also a dump station. Since most folks visiting are only there during the evening and the night it's quite ok. We found it to be quiet, clean and near public transportation. During the week you have access after a couple of hundred feet walk, to a ferry. A 10 minute walk will bring you to a subway station, and we found it was a safe walk. Prices were $60/night. During the summer there is a night club close by and they play loud music during the weekend nights, which might disturb some of the campers. On a future trip to NYC I would stay there again.