Bret,
I believe I've seen that shed as well and had been wondering about that. I had a memory jog though and I believe I know where another car is. In a front yard in Mt.Vernon there is a very nice little shed that looks exactly like a camp car. About 8 by 30 or something, curved roof, 2 windows on each side and a door in the middle. Next time I'm through there I'll take a better look at it.
Thanks Again, Taylor