Great information Jo! Also, Jamie posted recently about an experience that he had - do NOT put the snakes on the floor of the vehicle - there is excessive heat that is generated that comes through the floor and he lost 2 snakes to over-heating as a result. I'll see if I can't find that thread.
Edit - 2nd paragraph he talks about it - I had heard that from Tim Bailey as well, from someone who had snakes on the floor board behind their seat that also overheated:
http://www.ball-pythons.net/forums/s...ad.php?t=95852