Was just reading over some horror stories of A frames getting water and mold inside. Some of us don't have the luxury of storing inside, and I don't either.
Two questions passed my mind: one, would an ordinary tarp take care of this, and would a tarp add problems of their own, ....
....and two, what about storing the unit in an open position? This sounds a little crazy, but a high pitched roof has major advantages over a flat roof when raining.