[JRTJH]

When we first moved up north, I covered our fifth wheel that first winter. In the early spring, when we had planned to head south for a few weeks of warmer weather, I found the cover was frozen to the trailer roof and all of the plastic structure on the roof. There was no way to safely remove the cover and no way to tow with it on the trailer, so we were "effectively grounded at home" until the temperature warmed up enough to remove the cover.

When the "building season began, I built a second pole barn, specifically for the fifth wheel and the boat/toys so they are out of the weather.

So, if you're in an area where the temperature in fall and spring regularly swings above/below freezing, don't expect to get the cover off the trailer easily as long as there's still ice/snow on it.