Now in Las Vegas but lived in Dallas before I retired, Hope this helps:
Dallas to El Paso, over to Yuma then North at El Centro Ca. pass on West side of Salton Sea on Hwy 86 to I-10 then over to Palm Springs. This keeps you South which is important in the Fall/Winter.
If weather is not a concern, might consider going North at Casa Grande to Phoenix then West on I-10 towards Palm Springs. This takes you by Quartzsite which a great spot to park in Dec. or Jan. it is a site to see at least once. Then short drive to Blythe Ca and on to Palm Springs.
Will be passing a number of Escapees Parks, The best one I've used is South of Palm Springs at Aguanga Ca.
Have a safe trip, hope this will be a help.
Ron & Margie
F250 7.3,32' New Horizons FW