It's tricky, ventilation is a primary consideration for comfort and mold/rot mitigation. But every time you ventilate, you make the trailer more vulnerable to moisture intrusion. Catch 22. For sure I'll try and replace whatever hold my panels onto the studs with threaded holes or something to facilitate easy access to walls. And no glue!
Another thing, I never hear much talk of redwood or teak ($). I've owned ocean boats, it's great stuff. Plywood is strong and cheap, but I hate it for it's lack of weather resistance. It always, sooner or later, starts checking, softening, warping, delaminating. Not saying substitute redwood for plywood, but it's good stuff and it seems to be off the radar here.
Sorry to obsess, but I have horrific mold allergies.