One of a kind?

I often visit shows with the sole intention of photographing some of the cars that turn up. Every now and then I discover something very special.  Now the problem with many shows is, they are often held in fields and I would much more prefer to photograph a car on a raod surface. I will often ask a vehicle owner if he would help by moving his car to a space where I believe the resulting photograph would be better. Most of the time an owner will say yes