Tube The Ammonoosuc River You will start your lazy river tubing experience in the center of Bath, just behind the Historic Brick Store. With the Bath Covered Bridge as your backdrop, you will float approximately 1 mile down river back to the campground. The trip usually takes about 1 – 1 ½ hours, depending on how much “lazy” you bring to your lazy river experience. Tube rentals are available for guests of Twin River Campground (transportation unavailable at this time)Guests are welcome to bring their own tubes. (Tube Rentals available June through August.)