Technically, No you are not allowed to bring a water camera on the slides. They are considered loose articles which can fly off the slide and possibly injure someone. I would recomend bringing a hip pack. This will work on all slides except the body slides (Summit Plummit, Slush Gusher and Humunga Kowabunga) where you will have to hold certain items in your arms as you ride the slide (glasses, shoes/sandles, anything with buckles/rivots/metal).