We like to travel US highways rather than interstates. As I plan a trip, I use RV Trip Wizard, Allstays and RV Parky to identify potential stops.
Seems like almost every state, particularly west of the Mississippi has a handful of non-chain small motels with some RV spots. Usually in out of the way places, like the one in Marathon, TX mentioned above. It is the only place to stop between Alpine and Sanderson on US-90.
If you are going to Big Bend NP, it is the only place to stop and be ready to enter the park early in the day from the north.
I haven't stayed at these, but they looked good while driving by:
Turner Inn and RV Park, US-60, Mountainair, NM
Red Roof Inn and RV Park, US-287, Childress, TX
Glenn and Mrya's Lodge and RV Park, US-82, Seymour, TX
Fort Davis Motor Inn, TX-17, Fort Davis, TX
We have stayed at Historic Prude Ranch just west of Fort Davis, TX - this is a 'dude' ranch type place, but mainly guest cabins. They have a couple dozen RV pedestals in a field. Full hook ups. A few of which are 50 amp.
Frankly I don't recommend it. The pedestals are 13 feet apart, not prep for the RV parking, and poor connections for sewer. I had to think what it would smell like in the summer with several risk in the RV area. But it was $22.50 per night, no taxes for 2 nights with Passport America. Were there in Sept 2020. As a place for a non-RV reunion or gathering - I would recommend it. RV - no.
