Great idea, Kubotaman! I like the idea of setting up tactical call signs. Our ARES/RACES group practiced that a long time ago, and it worked well once we got used to it. It helps easily identify the location of the ham, and helped expedite needed information.
Here are a few examples I came up with.
Medic {call sign} For emergencies: MAYDAY MAYDAY MAYDAY {tactical call sign, call sign} EMERGENCY MEDIC NEEDED AT {location}
Wrecker {call sign}
Since there are 4 trail rides happening at the same time, how about:
Trail 1 {call sign}
Trail 2 {call sign}
Trail 3 {call sign}
Trail 4 {call sign}
The tactical trail names could be modified to reflect the trail difficulty level.
Other thoughts: Assign tactical call signs to all stationary locations.
Other considerations: setting up a directed, controlled net vs. leaving the frequency open and quiet when not needed. Directed nets require slightly more manpower. Open nets are helpful when you're listening for emergencies or traffic. What do you think, Steve?
The main areas I can think of that require amateur radio operators in close proximity are the Medic tents, the Wreckers, and the trail rides.
Couple things about that.
As long as it's a ham on the radio and no joe blow this should be fine but how are you addressing id'ing every 10 mins when using tactical call signs?
A directed net is fine, but not needed. Open frequency is just fine. Think about it.
Directed net
KE5EUA to Net control
Net control go ahead
KE5EUA requesting to direct to N5NIR
Net control roger, proceed
N5NIR this is KE5EUA, Paul are you there?
Nothing heard, back to net control
Net control, thank you, net control standby
Now we will use open frequency
N5NIR this is KE5EUA, Paul are you there?
Nothing heard, KE5EUA clear
Mayday is a no no, we are not in the sea. Now if it is truly a life or death situation then by all means use "break break break" instead.