Corny & your cat are both in my good thoughts...
But about your transport of Corny in just a tub: what if your vehicle broke down on the way there or back??? (that HAS happened to me with a snake
on board!) If your snake is not in an insulated "cooler" & you get stuck without your auto's A/C, he could die waiting for assistance. How many ppl do
you think will stop to help with your over-heated snake, anyway??? Just think about it for next trip...ok? I know you care, but "things can happen".