It will be tricky for sure. I think if I was going somewhere cold, I would pack them same as you would for shipping, maybe. You give me many things to think about! My DH has moved many times with his eight year old BP with no ill effects, and he just pretty much put the tank in the back seat and off he went. We'll definitely have to come to some kind of good solution- the dog, the baby, and me need it cool- the snakes need it hot... now, I do have rear and front AC in my van. I may try driving around with the rear AC off and see what kind of temps are maintained back there.