Later today, I'm flying from Chioago to Tucson (at my expense) with my sister in-law to help drive my wife's parent's RV back to Illinois.
When they drove down at the end of December, it was noticed that my father in-law had some issues handling the 33 foot monster. Not wanting to lose my in-laws just yet, I offered to help them drive it home. They took along their car, and my SIL will help drive that. I've never been to New Mexico, and blowing through Albuquerque at 65 miles an hour appeals to me very much. Arizona, New Mexico, Texas, Oklahoma, Missouri, Illinois.
I am perfectly content to drive 10 hours a day for three days to make it back by Saturday. In the past, my PILs have preferred to take slower state routes in order to avoid OK City, Tulsa, and St Louis. That route takes includes Kansas and takes four days. I enjoy my PILs, but I would fear for their lives during the last day.
Dwight D Eisenhower commissioned our wonderful Interstate Highway System for a reason: To drive from Tucson AZ to Genoa IL in three days. One thousand, eight hundred and forty-one miles. Sure, the Kansas route is 20 miles shorter, but that 20 miles savings cost 6 hours of drive time and an extra night.