I think I'd close it up. Here in Mi we get those wild temperature swings in the spring and fall. If it warms up after a particularly cold snap, water will condense on anything cold. That's pretty much OK on the outside of the coach, maybe not so cool (yes pun intended!) on stuff inside it?
To illustrate, I visited a plane I had stored in a hangar with both the planes doors wide open in one of these warm spells. I was absolutely shocked to see condensation literally running down the face of nearly everything in the instrument panel. Many thousands of dollars worth of very sensitive (expensive to repair) electronics!
Thankfully no harm done, but it taught me a lesson I'll never forget...
1997 37' HR Endeavor, 275hp Cat, Freightliner
03 CR-V Blue Ox, Ready Brake