When your LO falls asleep for a nap in the car, do you let them sleep in the car? Or do try to transfer them or just wake them up if it's not nap time?

LO2 fell asleep in the car today and he has been such a peach today, so I just let him sleep. I would have preferred him taking a real nap in bed, but I was more afraid of what would happen if I woke him up lol.