No problem getting diesel, it's available everywhere. As I posted on another thread, watch for snow and hwy closings on I40 thru NM and AZ. Be prepared to head down to I10 if it comes up. On I40 you will be over 7000' ft altitude going thru the Flagstaff, Williams area, that means snow in the winter.
2006 Sea Breeze LX 8341 on a Workhorse W22 Chassis with 22.5 Alcoa Alum wheels,
2011 Chevy Colorado 4X4 with Ready Brake