Apparently covers trap moisture onto your RV and are therefore not recommended. Is there any inside storage available in your area? Our daughter stores hers in the agriculture building at the local fairgrounds. They do a booming business there storing RVs, boats, etc. We store ours in Florida for the winter (with us using it).
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2012 Cruiser Sahara 330SS
2015 F250 Super Duty diesel
Check with the county fair in your area. More and more, I see the groups that sponsor the fair getting smart and renting out the barns for winter storage.
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2017 Ford F350 Super Duty 6.7 King Ranch Crew
Sold the 2016 Crossroads Sunset Trail Grand Reserve 32BH
2020 Grand Design Momentum 320G