I wonder if there's more than one place to do the river tubing? We did it in Dec. and I wasn't impressed at all. It was fun, but not worth the money. It was only 20.00 pp, but it wasn't very long. We did a tour on our own, and they dropped us off there. Then met us at the end.
I wish it had been longer. But maybe you'll get more input and find out if there's more than one place to tube. OUrs tooks about 1/2 hr and that was stopping for a drink. (we had to pay for it) It was along side of the bank. Just drinks from a cooler.
Any questions, feel free to email me.