I have a question;
Considering the time and effort to put on and remove a cover, how often do you do this? Reason being, I take my camper out about once every other week. More in summer than winter, but I use it year round pretty much. I'd be looking at 20+ times climbing up there to put it on and another 20+ times to take it off. It would sort of defeat the purpose of making a getaway when the mood strikes or an invite to take off pops up I would think.
I bought a cover. Used it 2 or 3 times when I thought it was going to be especially bad weather. That was enough for me to consider the risk of getting up and down so much.