Just a little further on this - I suspect that Real County went to the Middle Rio Grande VHF P25 system. It looks like we've identified at least one broadcasting site in Real County, but we don't have any talkgroups identified at this time for Real County...
I'm even later with my observations. Sorry, I wasn't able to confirm everything. Maybe someone else traveling through in the future can. I will try again later but don't know when I will be up there again.
3995 - Real Cty. S.O. primary
4002-- Leakey EMS ? (not confirmed)
4004- Camp Wood EMS ? (but suspect Camp Wood due to the addresses units were dispatched)
4009- Real Cty. Fire (not confirmed but fire traffic within county)
3700 - Eagle Pass P.D.
3705 - Eagle Pass tactical channel
Not sure why they were patched in from time to time.