Little Rock Federal Scanning - Updated

I'm set up in Little Rock, Arkansas for the weekend and will have some time for searching the federal bands. Here's some of what I've been hearing:
163.8125, 131.8 - US Marshals
163.8125, 136.5 - US Marshals
166.7125, 146.2 - Unknown repeater, sounds like maintenance types
168.3625, 146.2 - Unknown repeater
168.5250 - Paging, McClellan VA Medical Center
169.5875, P-25 - Little Rock Air Force Base Security Police
173.1375, P-25 - Unknown, likely Little Rock AFB
173.4375, P-25 - Little Rock Air Force Base, sounds like base security police
173.5375, 118.8 - Unknown repeater
173.5875, P-25 - Little Rock Air Force Base, Fire / Crash Net
406.1625, P-25 - Motorola SmartNet trunked system 4628
406.3625, P-25 - Motorola SmartNet trunked system 4628
406.5625, P-25 - Motorola SmartNet trunked system 4628
406.7625, P-25 - Motorola SmartNet trunked system 4628
406.9625, P-25 - Motorola SmartNet trunked system 4628
407.1625, P-25 - Motorola SmartNet trunked system 4628
407.3625, P-25 - Motorola SmartNet trunked system 4628
409.7625, P-25 - Motorola SmartNet trunked system 4628
409.7375, D664 - US Postal Service
415.2000, 103.5 - DHS Federal Protective Service
418.7375, D664 - US Postal Service, input to 409.7375
418.9500, 156.7 - DEA
419.1750, 210.7 - DHS Federal Protective Service, input to 415.2

The UHF trunked system noted above was originally reported as being located at Little Rock Air Force Base. However, I was unable to detect any of these or any other 406-420 MHz signals radiating from the base as I drove around the base perimeter today. The control channel on 406.1625 MHz started to come in very weakly as I drove back south to Little Rock, and was still very weak at my hotel. Since all the radios using this system are running encryption, I'm calling this "Unidentified" for now.