What does Hunter say?
I've always left mine on the transom, in the operating position. There seems to be plenty of ground clearance, and the trailer tracks ok. I don't trailer that often, and it's almost all good roads. Maybe I'm wrong, but I would think operating the motor, especially in rough water, would put more strain on the mount than trailering. I don't recall anything in the manual about it, but I might have overlooked it.