If you use a topper with no windows how do you install an air conditioner? I think what you are trying to describe would work with a small window AC unit, but not just set inside topper.
We camped next to a small, maybe 14-16 ft, old, but nice travel trailer that a couple was fll timing for the summer in. Imagine my surprise when one of the owners came by the second afternoon and let out 2 Great Danes and a Pit Bull mix. Never heard a peep out of the dogs and they hadn't done any damage to the trailer. The lady said they just lounged around all day and she would let them out on her lunch break.
2008 Chevy Silverado 2500 Duramax Crewcab
Jeep Commander - sold
Flagstaff V-Lite WRB26