The TFR close to San Angelo comes and goes quite a bit and I have been checking it regularly for about 3 years.
2 years ago I took a drive to the area and couldn't see anything that would warrant a TFR. The airstrips in the area are dirt strips and private.
I am intrigued by the "Keystone Ranch" is of particular interest because of the name. Not much is there but maybe some clues can be grabbed by digging on the owner Gerald F. Hatch.
https://airportguide.com/airport/info/5TE6#location
https://tfr.faa.gov/save_pages/sect_print_4_7099.html