- When you're in Carmel Hamlet, New York, there are a few convenient options for RV dumping.- You can visit the Rest Area - Danbury Welcome Center, Eastbound, which offers dumping facilities for black water and gray water tanks, as well as access to fresh water and a hose for flushing tanks.- Another option is Lake Waramaug State Park, where you'll find a dump station and beautiful lake views.- If you're looking for a campground with dumping facilities, check out the New York City North KOA Campground or Kettletown State Park.