Dang, if you are driving south across the dam to I 40, you are going to miss Barstow, CA - a strange jewel of the west.
Not much to see across I 40 in AZ except nice high desert country and then higher, until you get to those craters near Flag (Grand Canyon is an hour of driving north from Williams, AZ). Sedona has some lovely natural features, but is a major tourist trap. Palo Duro Canyon in W. TX is interesting. There was a very good steakhouse in Amarillo in the 60s and early 70s (on Amarillo Blvd. before the freeway through town was built) but I think it is gone. After that - OK, MO, IL, etc. and I have no reccs for those.
