I have searched for and read all the posts I could find on transporting ball pythons when moving, but have not found detailed information on providing heat during the move. I will be moving with my three ball pythons from Delaware south along the east coast next weekend, so there is the potential for the trip to start out very cold and end up very warm. We'll be traveling maybe 14 hours and they will each be in their own snake bag and then placed in a plastic box. The box will be on the front seat of my truck and I'll have a towel available in case I need to cover the box due to bright sunshine. I will also have a thermometer in the box, but what should I use for supplemental heat and where in the box should I place it if it's needed? Thanks so much in advance!! ET, Sunny, Honey and I will greatly appreciate any advice that will help them arrive safe and warm to our final destination!!