I agree with Katherine's suggestions. When my DD was that age she would sleep if I APOP'd in the stroller as long as she was closed in with the hood to block things out, and I would jiggle her a bit. Not as long or restful as a nap in the crib at home, but enough to make it through the day just fine. Or I would time the drive so that she'd fall asleep in the car. Probably a short nap again, but it's important for you to get out too and he will be fine!