I have one repeater now running full time with a BBB & URI. The tower site doesn't have internet at the location yet. Probably not until spring. That is a future thought for doing all of this.
I have noticed that it took the system no time at all to loose its time sync and the time seems to be random. however as soon as I get the the bbb an internet connection from my phone it syncs right back up. I have a gps at my finger tips with a data out