It also depends greatly on where you live.
For example; In southern Arizona, humidity, snow, and rain are not an issue, but heat and UV are. Different problem, different solution.
I bought a 12' x 20' silver 20 mil thick tarp, and ran cargo straps under the trailer to keep it in place when the dust storms blow in.
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2011 Forest River Rockwood Premier (2514G)
2011 Ford Ranger XLT 4x4 4.0L V6
"Winter in Phoenix falls on a Tuesday this year..."
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