There is a Mexican place in downtown Presidio that has some good food. I forget the name but it is on the left side of the road after you pass by the highway that heads north (damn, I forget the name of that road too). Great place to go after driving El Camino del Rio.
There is a place we have eaten at in Presidio called El Alamo (on the right as you head out from Presidio to Shafter/Marfa..
BBH