FWIW,
when you leave a rig in the summer heat all closed up the oils in the plastics will come to the surface. There will be a yellow/orange look on everything made of light color plastic. This will make a trailer look older then it really is and may effect it's resale value. Spray painting with Fusion will fix the problem, but it takes time and effort.
Also leaving the stove fan vent open will help release any pressure buildup inside. RV's leak so bad I doubt if there ever could be a real pressure buildup problem.
I had one neighbor in Florida who left her gas class A there all summer only to have her tranny seal dry out. It leaked without her knowing it and she blew the tranny. She picked up a park model after that.
All three big snowbird states will be different. You need to ask the locals what you need to do to protect your investment. Here in Texas I put a 5'ver under a roof, two pails of damp rid, non clumping cat litter, charcoal, and all vents closed but the stove one. When we come back we still have two days of cleaning to get it back to where we left it in the spring. I also scrub the carpet with a machine using bleach water incase something is growing in there when we pull it out.
I've also seen some storage lots that have cockroaches in some of the rigs. Guess what happens if you park next to them :0. I use Borax in places that can't be seen to make sure there isn't an issue.
Thereโs no fool, like an old fool.