Travelling Tips?

So, we took an eight hour road trip last night in which I thought Ben would sleep most of the way since we left so late. Well, that was the plan anyway. Turns out he hates being confined in his carseat for any length of time. This was not the case until he started walking and decided that he does not like to sit still. I had my mom with me last night so she was able to keep him occupied at times.. he was sooooo cranky! I have to make the trip back later this week by myself!!! Help!?! Any suggestions would be greatly appreciated!