Conceivably you could use frequencies in the All-Mode portion of any band for something like this
AS LONG AS you pick one that's not in use
BY anyone/anything else
FOR anything else. Depending on the size of your private group & where everyone else is, the frequency your group chooses would have to be one that's not in use
ANYWHERE !! In different parts of the country (Or even a state), this can be a difficult thing to identify
To make this job easier, I would look at different bands as well as different frequencies. For example, 6 meters doesn't get much use
REGARDLESS OF MODE yet many people wonder why that is. What many of these people don't realize that if they've got one of those snazzy HT's capable of TXing on 6 meters,
THEY CAN SET UP AN APRS DIGI THERE as long as it's either in the Digital or All-Mode portion of the band
Either way, it all depends on how creative you are & wanna be
But in any case, it boils down to this -
IF WE DO NOT WANNA LOSE THE SPECTRUM WE HAVE - WE GOTTA USE IT !!!
Cheers & 73 