This morning I took a trip down to the Harris Neck Wildlife Refuge area in an attempt to identify some repeater sites for the Savannah National Wildlife Refuge Complex linked repeater system. Unfortunately, I did not hear the system in use the entire three hours I was in the area! Just my kind of luck. Some monitoring from last week led to some web research that has led me to tentatively ID one of the repeater sites: 169.825 is most likely in the area of Harris Neck. The only other repeater in the group I've been able to determine a location on is 172.450, which correlates to the Skidaway location that users have mentioned.
The trip itself, however, was not a total loss. Harris Neck NWR is not all that from Townsend Range. I was able to get excellent signals on activity from F/A-18Ds from VMFA(AW)-533 and from F-16CJs from the 169th Fighter Wing.
228.400 and 252.900 - Townsend Range Control
HAWK 81/82 (F/A-18D, VMFA-533) using 348.825 Tac 3 worked a simulated JTAC callsign METRO and also acted as FAC-A for HAWK 83/84 flight (F/A-18D, VMFA-533) using 299.300 Tac 2.
VIPER 21/22 (F-16CJ, 169 FW) using 140.125 V17 and VIPER 23/24 (F-16CJ, 169 FW) using 138.025 air-to-air did air-to-ground and air-to-air combat training with support from an AWACS using the callsign BANDSAW.