Snake road trip!

[thamneil]

Keep them out of the sun and heat. If its a really hot day, you can put him in a styrofoam cooler with a cool pack.

[Sonya610]

Yeah a styrofoam cooler is a great idea, add some substrate and hide and make it comfy. If you are traveling through areas with warm weather and you have a thermometer with a cord add that as well so you can watch the temp as needed without opening the cooler. Cool temps aren't a big problem, sudden heat spikes in an unattended vehicle can be fatal quick.

30 hours is a long time, there will be lunch breaks and rest stops and such with the vehicle turned off and no AC, take the worry out of it and monitor the temp at a glance. I assume this trip is mandatory for your snake right? Like you are moving or visiting somewhere else for an extended period?