Alright seeing as we just got back from our 2 hour tour, with a box of chicks. This is what we did, put them on the floor between my wifes feet, turned the heat to the floor and kept the car very warm. The lid was on the box so I wasnt worried about it blowing on them. You could tell when they were warm they would quite down, and if you opened a window and let some of the heat out they went nuts.
The other thing you do is turn the radio up
The other thing you do is turn the radio up