This post is a little out of sync, but I wanted to put it out there.
If you are traveling from the Tucson, Arizona area to Carlsbad, New Mexico, you may go through Texas! Geography is a crazy thing.
We drove through El Paso on our way. If you have a larger RV/Trailer, especially a diesel, stop to get fuel right by/in El Paso! There is literally nothing for over 100 miles (no bathrooms, no diesel) once you drive out of town. There were maybe a few small gas stations, but no diesel and nothing we would fit into. Please make sure to fill your tank completely full and also fill a back-up container of fuel.
After passing the salt flats, we stopped at a picnic area to put our emergency 8 gallon diesel container into the truck. I am so glad we kept that filled. I don’t think we would have made it into Carlsbad without it. There were several fuel stations that had diesel, but most of them are tight for larger rigs. We filled up, but not after I cracked the outdoor electric cover on the RV by not clearing the last ballard.
We did see a really neat informational sign at the picnic area though, so you never know what you will find when you stop!