You can haul your own cars all you want. Not to mention it's not u hauls job to determine what you do with their trailer. You are the one responsible for being legal. The legal issues come into play when you are hauling a competition vehicle somewhere with the potential to win money. It's very stupid and I would just say that I never make money, but they've been pinching a lot of tractor pullers and racers in our area.
Ohhh, ok, for me, "racecar" is just a car that isn't a street car anymore and I am too lazy to swap wheels at the track. I race for fun, so looks like I am set. Bring on the huge ass trailers! :woott: