I'm looking for tips on how to keep my reptiles sane and comfortable on a very long trip. Near the end of this month we will be traveling from the Midwest to the Southwest.

The first leg of the trip is about 15 hours of driving, interrupted by a week long stop, and continued with another 10 hour driving stint.

Im looking into heating/ cooling packs for the reptiles as well as reptile bags for the travel, but I still have questions.
I know this trip is going to be stressful on my snakes, (a 1.5year ball python and yearling corn snake) and I was wondering if I should continue to feed them on schedule, or feed them less, maybe feed them more the week before we leave?
Im expecting the vibrations of the car to drive them crazy and was wondering how to minimize that in storage.
Will they need water during the car ride down or some sort of humidity and how do I accomplish this?

In summary-
Are there diy options for the reptile bag for such small animals?
How will the trip affect their feeding (once a week) ?
How to reduce road vibrations in their storage?
Water/ Humidity concerns.