- When it comes to dumping in Belt, MT, you have a few convenient options.- Military Park - Gateway FamCamp is one of the popular dump stations in the area.- Another option is the Great Falls KOA Campground, where you can find facilities for dumping your black water and gray water tanks, as well as fresh water and a hose for flushing tanks.- If you're looking for a quick stop, Taco Johns also offers RV waste disposal services.- Additionally, Dick's RV Park provides a dump station for your convenience.