Director of Adventure Management Operations
That all depends on the fabric.I wonder if there's a spray that can be applied to the tent trailer's fabric to enhance its water resistance. Something that would work like Rain-X (for windshields). There probably is something like that, and when applied, would likely help the fabric bead and not absorb water.
It will still need to dry though, even if it's 100% waterproof it can mold like crazy.