They stop renting tube and don't have anything online about a cutt off time! The buses they drive are scary! Probably from the 70s and obviously not maintained! There are a lot of police so your limited on the level of fun you could have had. The tube they rent are a joke! You will most likely sink if you lightly bump against a river rock. The worst part is the river itself is discusting! It's cluttered with beer cans and the smell of dead fish! The bacteria levels must be astronomical here! Do not go here if you have a open wound! Bring plenty of water and sunscreen! Also bring a cell phone and most importantly, "YOUR OWN TUBE"! Make sure to buy a Tonto day pass before you leave town at a gas station. It will save you time!!