LMR - so 2020s
FirstNet is where its at - even in East Death Valley Lower Junction
The trick will be to bring all wireless transmissions into 1 system with priority for the priority messages. There has to be some economy of scale here versus putting up a radio tower for every guard shack and outhouse.
FirstNet is not the answer. FirstNet operates on AT&T towers and everyone knows the first thing that goes down in disasters are cell towers.
Over the last 3 years, wireless service was down throughout the 395 corridor including Bishop, Inyokern, Ridgecrest, Trona, and Walker Junction, a total of 8 days for various reasons including severed trunked line and wire theft.
At EDC this year, the sole AT&T tower that services the area surrounding the Speedway and Nellis AFB overloaded and crashed multiple times. AT&T had to bring in a portable tower so service was reliable.