We have stayed @ Liberty Harbour. No problem getting there with 38' RV towed with crew cab dually. Had views of the Statue of Liberty from our site, easy access to NYC. Short walk to restaurants and other amenities from the campground. There's a bar on site and security. Electricity was not a problem for us.
Our fiver is nicer, larger and has far more amenities than any hotel room I can afford in NYC, so @ $90 per night its a no brainer for me.