Also don't forget you need lora nodes to bridge farther areas or different sites. And you need them before shit happens. I recommend MeshCore for longer range comms and then you can bridge it with bitchat:

GitHub

GitHub - jooray/MeshCore-BitChat: A new lightweight, hybrid routing mesh protocol for packet radios

A new lightweight, hybrid routing mesh protocol for packet radios - jooray/MeshCore-BitChat