- Use two additional two-way radios, one at each site, on simplex to link the two repeaters
- Use two additional radios, one at each site to listen to the output of the remote site, and relay it to the local repeater
- Similar to #2, Use two additional radios, one at each site to transmit local audio on the input frequency of the remote site
For cost and power considerations I would like to use some cheap HTs for the linking (the two repeaters are not too distant, the issue is terrain blocking an isolated area). But, would consider used mobile gear as well.
Any/All ideas welcomed.