there are a number of rv parks in Del Rio. Seminole State Park is about 35 miles north of Del Rio. At Marathon there is a decent rv park and a restored old hotel with gourmet dining. if time allows, you can go south down into Big Bend Nat'l park and go out the west side and then go north back up to Alpine and highway 90.
there are a couple of so-so rv parks in Terlingua, just outside the west entry to the park. Alpine has a couple of decent rv parks.
6 miles east of Marfa, you will see a rest stop. It is the site for viewing the famous Marfa Lights, a mystery yet unsolved and confirmed by many, including us.
๐ A good place for an overnight stop.
Van Horn has two or three so-so rv parks, not bad, but not fancy.
At El Paso, there isn't much...most folks wanting rv parks go on to Las Cruces to The Hacienda RV park. We prefer staying at the Flying J at the exit 1 in Anthony.
There is a NM visitor center with parking just north of the state line, same exit as Flying J. Or, there is a TX visitor center on the other side of the road, south of state line one mile. Or there is an rv park beside the Camping World store on the east side of the highway, south of state line. You can see all these with Google Earth if you have it.
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