My garage is integral to the house and although not heated, it never goes below freezing. I tried storing my pop-up in the garage one winter... too many spiders. They made their little winter cocoons in the tire treads, underneath, inside... everywhere. Because it didn't move for about six months, there were lots of spider webs hanging from underneath the pop-up to the garage floor too.
After that experience, I simply covered the pop-up with one of those blue vinyl tarps and left it outside for the winter.
Maybe you have fewer spiders where you live.
2009 GMC Sierra 2500HD | Crew Cab | Standard Box | 4WD | Duramax/Allison
2000 Jayco Eagle 266 | FBS | TT
1986 Coleman Laramie pop-up -- Still in the family!!!