C.W.
my son goes through this every couple of months. I put a few toys in his room and told him that if he doesn't want to sleep he can play quietly or read books. At least if he isn't sleeping he is doing something quietly. Usually he falls asleep in a few minutes after I leave. If he does cry or carry on, I leave him up there until around 3 PM. Put some things in his crib that he can do and then leave him until you think it is time for him to get up. For most kids, it is a phase. And as for the sleeping in the car, I remember reaching around and pinching them or trying desperately to keep them awake because if they fall asleep in the car, it is like in their mind, they have napped and you will not get them asleep again in that afternoon.