Chapi, we close everything up tight. I feel if it is dry inside when you park it, and close everything, there is no possibility for moisture ingress. Has worked for me the past 25 yeas of owning an RV, though we do get fairly dry winters around here.
2017 Escape 5.0 TA (someday soon, I hope
2015 Ford F150 Lariat 3.5L EcoBoost
2009 Escape 19 (previous)
“Most folks are about as happy as they make up their minds to be.” — Abraham Lincoln