We have owned 3 different class A motorhomes. Living in Iowa, we tried a good quality cover for 1 of our units. They are a "bear" to use as they are heavy and taking them off in the winter is difficult and a bit dangerous if there's snow/ice on the roof. The next problem is what to do with a large, heavy, snow/ice coated RV cover when you take it off in the middle of winter? We got about 3 years out of the cover before it shredded. We gave up on the cover idea and built a motorhome pole building. Best thing we ever did, we consider it money well spent. Of course we realize not everyone has 6 acres so you may not have the building as an option. Good luck with whatever you decide!
Days camping (2016)----181 days
Days camping (2017) --- 82 days
2016 Wildcat MAXX 28RKX (33' TT), 2007 13' Scamp
2015 Ram Laramie Hemi, w/air suspension
30 years RV'ing
11 different RV's