When I was headed back, and was just east of Baird, caught some activity on TG 64 (I think), right before I dropped off the hill out of range. Didn't catch enough of it to identify what, and I was sandwiched between a couple of trucks on I-20, figured I should watch the road, not the scanner.
I'm going to leave Unitrunker running all day tomorrow while I'm at work. Should be plenty of time to log all of the talkgroups currently in use. I'll post my findings tomorrow night.