Road Trip
Sounds like a great trip MR4V 8)
Holbrook is a cute little town rich in American Indian history. Should be alot of Navajo, Hopi & Apache tribe info for you to marvel. If you have time, check out the Petrified Forest Nat'l Park.
You'll like Williams. Very tourist friendly.......Be sure to reserve a spot on the Grand Canyon Railway in advance as it sometimes fills up ahead of time.
Blow thru Kingman and hit Vegas a day early or go to Laughlin, Nevada instead of Kingman. Laughlin is a mini Vegas right on the Colorado River and less than an hours drive from Kingman. ;)
Have fun and enjoy your stay in the states!! Take lots of pictures.