Hello Michael,
We do service a handful repeaters, and I'm hoping to do a some sort of RF based TCP/IP solution, haven't found one I like yet. Any recommendations? I could go Wifi based, 900/2.4,5ghz, but I'm hoping to find something other then packet to use at 440 or 1.2.
Well, that all depends on the path (distance, obstructions, required data rates, and what you need to transport (IP, serial, AX.25, etc)). My local group is running a few of the Ubiquiti NSM3 Wifi units in the 3.4Ghz HAM band to transport IP for SIP VoIP phones and other things and they work well.
--David KI6ZHD