We need some more information. What time of year? What are you hoping to see?
How much time do you have?
Any of the interstates are about the same getting across the midwest so it really depends what you want to stop for along the way.
Is Arizona the only state you're planning on really siteseeing? Would you consider any of Utah or Colorado for some of your stay?
Let us know.
Full-Timed for 16 Years
.... Back in S&B Again
Traveled 8 yr in a 40' 2004 Newmar Dutch Star Motorhome
& 8 yr in a 33' Travel Supreme 5th Wheel