i think alotta peeps overthink the transport of their BP's and snakes for a short trip home from the show, store, FedEx hub, etc. basically...
1. IMO the #1 thing is safely securing your snake. the car has alotta nooks and crannies and an unsecured snake can get lost in it and hurt themselves: https://ball-pythons.net/forums/show...ehind-the-dash tie up the snake bag or securely seal the delicup lid and put them in a vented tub, cooler or other lockable container.
2. if u are warm and cozy in your car, so will you new snake that's being transported. i hope that your car heater and fan nowhere near approaching Death Valley 110-plus degree temps but a warm and comfortable ambient temps is all u need. no heat pack is necessary. that's only needed for box shipping through multiple time zones and/or climates when the snake has no heat source.