No, no--never done car play. I always have insisted on hosting if he doesn't want to host or can't. I can tell you that there have been plenty of men arrested in their cars for giving head while parked in a public place. I don't want to be that guy. I have too much to take that risk. And I am not a risk seeker.
Plus many parking lots now have camera surveillance. I just don't want to take those kinds of risks. Give me my empty warehouse, the guy can and often will get completely nude and he can take all the time he wants using my mouth or ass.