By the way, about car trips with snakes:

I know it's cold now this time of year, but even if you were taking a snake in the car in the summer, remember that using a styro-foam cooler to contain your snake
on the way there also protects them from excessive heat, which can & has killed snakes. Sun coming thru windows can over-heat a pet quickly.

I still remember a guy on another forum some years ago who took his favorite bagged snake on a several hour ride in his truck with the bagged snake on the floor-
the heat from the road & engine coming up thru the under-insulated truck's floor killed his snake by the time he arrived at his destination...the poor snake couldn't
escape the heat & of course, couldn't make a sound to indicate discomfort...just suffered in silence. As snake owners, we have to think ahead on things like this.

A guy in my town (I'd seen him once, but didn't know him) used to walk around with his boa on his shoulders in warm weather. I found out later from a vet tech that
his snake died from heat stroke: the combination of absorbing direct sun while sitting on his owner's shoulders -he somehow forgot he was yet another heat source,
at roughly 98.6* body temperature, and the poor snake could not escape the heat, nor could he let him know.