Pay the $50 or so or the semi parking fee, and bring along a car carrier to park it in each day. Go during a slower time period and purposely park as far away from the front as you can and hope no one parks near you? WDW isn't really setup for cars of that caliber.
I never even would have thought about a car carrier... excellent idea! He could drive down and then just rent one from the area ahead of time. Thanks.