I put down the deposit on a carport. 31' long, 18' wide and 10' legs. Should keep the trailer dry and clean, allow easy access to load and unload, allow us to open the slide while under cover, easy to back under and pull out from it.
Growing up we had a cover for our Class C. It got to be a huge pain in the butt trying to take the cover off without ripping on something. It seemed that it was ALWAYS wet when we took it off so we either needed to drape it over something to dry off or it got mildew on it.
Sure, the car port costs 10 times more, but I know I won't actually use the cloth covers and even if you do they only last a couple of years anyways.