I second that motion, having lived in Salt Lake near the great salt lake and also years of seeing salt used to melt ice on road, vehicles tend to rust quicker than being someplace less salty.
I had a friend who kept his Class C at open storage area in Panama City Fla.about 1/4 mile from the beach. The company would set it up when he called and told him he was coming down. within 3 years it was a bucket of bolts.The water and air will destroy everything over time.