I did a cross country from San Antonio to Marfa while building time for my commercial ticket. This was 4-5 years ago. The FBO there is great! I asked for a car to run into town for lunch, they told me all that was in town was a Dairy Queen. So the lady there made me lunch instead. Home cooked food beats DQ hands down!
If you spend a few nights, try and go the McDonald observatory. It is just north of Marfa in the Davis Mountains. The tour they have starts in the afternoon, with a break for dinner and then you return after dark for the outside astronomy presentation. Bundle up. It gets cold! Ft. Davis isn't bad either.