Our little girl is a very wiggly baby and often times loses her patience in her car seat during a 15 minute car ride. However, we made it the whole way only stopping for gas and also lunch in Vegas for 1/2 an hour at a Subway. She never cried, never threw a fit. She didn't even get wiggly until the last 2 minutes of our ride. Here are some things I kept in mind while preparing...
1. We left at 5 AM. Lily slept until 7:30, so by the time she woke up 2 1/2 hours were behind us (as well as some icy roads and a snow storm.) She took her morning and afternoon naps in the car for about an hour each, so she really was only awake for a little more than half of the trip.
2. Since I am only bottle feeding now, I put water in 6 of her bottles and just brought the whole jug of formula. This was very convenient that I didn't have to stop to get water at a gas station every time she needed a bottle.
3. Every time we stopped for gas we got Lily out of the car and let her walk around and threw her up in the air and stuff to help get her wiggles out.