I'm not too far south of you, in the northeast L.P. My opinion, sun and moisture are the two biggest enemies of camper longevity, and anything you can do to reduce or eliminate exposure to either or both is worth the effort.
My advice would be to rethink your aversion to some type of carport.
We keep ours under one, and we also cover the camper with a breathable cover when we park it. The camper gets a wash before its put away, and when rolled out for its next outing it looks as good as it did when parked.
Whatever you wind up doing, I hope it works for you.