Well my son was about 7 when he fell off the same type of scooter (we should throw them out!), anyway he broke his arm in 2 places. He even went tubing in Rice Lake in Canada. WE did the best we could with plastic bags, we didnt have the sticky saran wrap a few years back....But We would take the blow dryer with us in case he did get it wet. Only thing is when it would get wet, it would itch more and the smell was awful. I wish I had some advice but the only thing I can think of is what we did. About 2-4 tops bags and duct tape for swimming. Dont let the tape touch her skin tho, its horrible and painful to get off. We would just wrap the tape around the bags tight enough, but not blocking off the circulation. Good luck, she still can have fun!