PEMEX 7027 is on the east side of the hiway. As you go south you have to turn around and go back to it. We stayed there going south last October. There is a fenced parking area behind the station with a guardhouse at the gate. We gave the guard some pesos but I don't know if it was required. It was hot, dusty and noisy but it IS a truck stop. Coming north in the spring we stayed at an older RV park off the west side of the highway. Run down with horrid bathrooms we didn't use but it did have electricity and was quiet except for the roosters in the morning. We would stay there again rather than be at that PEMEX