I thought we'd want/need the tubes, but they turned out to be more trouble than they're worth. On our first day, there was only one tube left, so I decided to rent it for the 2 hrs. ($3/hr) we knew we'd be at the pool and we'd trade it off between the 5 of us. DD11 used it first. She floated around the lazy river for 15 min., but complained it was hard to move, because it was so big. Then DS7 and I tried it and found it cumbersome and hard to maneuver. The lazy river doesn't flow as well as the water parks. It takes a fair amount of paddling and kicking to get around. You can't take them in the shallower areas or by the big slide, so when the kids wanted to move into another area of the pool, we had to lug the thing over and park it on the side. Several people tried to take it. We didn't want to risk getting extra charges if someone took it and didn't return it, so DH decided to sit by the pool and do guard duty. We didn't bother with the tubes the rest of our stay.