We use the O2Cool fan in our
Scamp 13 as well. We position one tied with zip ties to the counter support of the sink, blowing across the bed, and then the kids each have clip on fans to blow on them in the bunks. We also leave the screen door open, through the night, so that draws in a lot of cool air. Last summer we camped in eastern Nebraska, temps were 80's during the night, high humidity and we slept very cool.
(edited to add, that we have a voranado fan in our son's room at home, because his bedroom is SO HOT no matter how low we turn the AC. That is one amazing little fan! I'm very impressed with how well it cools his room down.)