I find if its just a 5-10 min nap that it doesn't affect his schedule so I just wake him up and carry on as usual.
I also try and time car rides during a nap time. Much easier that way
If you have electric windows, open a back window a little bit and then close it again. It distracts my LO enough if I'm 5 mins away from home!
Ahh I have this issue too 🙈 I try singing and talking loudly to her to try and keep awake but with no success! I guess I am the same though as I have always been able to fall asleep in the car easily so she must get it from me!