Can it be done? Should it be done? Civilian Communications are established differently than other services. Law Enforcement, Marine, military, are just some of the things that come to mind. Example of the civilian world is, CB, 40 frequencies and are incapable of communicating with those on any other service. Some FRS radios are capable of using GMRS channels but cannot communicate with anyone on MURS, and Amateur Radio even with all of the things you can do with it, normally can only receive outside of the amateur radio band.
One of the ways to interoperate is to select a service that will give your tribe the best options for your particular situation. Are you going to need extended ranges to get over mountains? How reliable do your communications need to be? Is everyone in your tribe going to need to be licenced or are they more of "the less the Government knows about me the better?"
One of the best services available to us mere mortals is GMRS/FRS. Even though GMRS requires a pay to play license, you don't need to know the difference between a picofarad or microhenry, or what a resistor or inductor vs conductor etcetera. GMRS does allow you to use a repeater to extend the distance of your GMRS radio, and with it being shared with the FRS service, your tribe can establish a pretty sweet set-up.
One more thing; Amateur radios aren't allowed to transmit on GMRS freqs. They have too much power. Of course legitimate emergencies( SHTF) are exceptions to all those exclusionary rules.
My thinking has been layers of each.
My only comment to this is that it is SO easy for anymore to get a tech license. You memorize a few questions and let the technical stuff stay with the guy's in that subject.. And you can still use the GMRS/FRS.. Ham tech license opens up a whole new world if you want it. Winfield u can have both worlds on the frequencies just so long they have a licensed ham. Most people have the radios.But the fcc is cutting that off to late like they always do.. I will leave you people at peace. LAter.
I've never been a fan of the memorization method because just like most algebra in high school, one summer later it's mostly forgotten. It does however open an opportunity to instruct these new radio operators on procedure and tradition. Someone wiser than myself once told me, a little knowledge can be the most dangerous thing.