Knight,
I see that you're doing some summertime desert driving. I'm not sure how flexible your road trip timing is, but I have an idea. I have some fantastic memories of doing some summertime desert driving in the pre-dawn morning (specifically the Great Salt Lake Desert and points west...which you WILL be driving). It's really amazing to roll the windows down and smell the cool desert air blowing through your car. The sun will rise at 6:01am that day, so get on the road by 5am at the latest. I know that's not so easy for most folks, but doing strange things like that really add something special to a road trip that involves a lot of interstate driving.
Have an amazing journey!
Andrew Van Winkle
roadtripwise.com