If you have a seat for him, take his carseat. Chances are, he will fall alseep at least part of the trip. We did an 8 hour to HI when my dd was 15 mos. It was, ummmm, a challenge. My other advice is to pack lightly! When we traveled we had a million carry on bags, dvd player, car seat, camera, camcorder. That was way too much. I think the dvd player for a 1 year old is questionable. We tought it would really keep my dd occupied but it did not. She would not leave the headphones on and just kept messing with all the buttons. So, for us the dvd player was not good at 1 year old.