What times do you have available for Aug 25 and how long is trip? I have party of 5 or 6

Its not actual time slots. You go to the place, rent your tube, and then wait in line for the shuttle, in the blazing sun, which sometimes takes a veeeery long time. I feel like i remember it taking about 5 hours, maybe longer if you linger more at the luncb stand.

No if you go through the company you use thier tubes

Did you see anyone bringing in their own tubes or just went by themselves?