Depends a lot on where you live and store your coach. If your coach is outside in a snowy climate then yes. When snow builds up on the roof it can create dams that will channel water in to your coach during periods of melting, covers can prevent a lot of that. Lots of falling leaves can clog the openings around your ac which means you’ll have to remove the cover in the spring to clean them out.
Since you live in Wisconsin I would say yes to covers.
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