You'll find several convenient dump stations near McHenry, Illinois to take care of your RV rental's waste disposal needs:Burnidge & Paul Wolff Forest Preserve offers a dump station where you can empty your black water and gray water tanks. Novak's 83RV Inc is another option that provides a dumping facility along with a hose for flushing tanks.Country View Campground and Yogi Bear Jellystone Camp are additional campgrounds in the area that offer dump stations for RV travelers.