Just try and start a union in a place like TN...Management circling around you with tanks is a good metaphor ;D
Fact is, even in non-"right to work" (pro-union) states, setting up and maintaning a union in this climate with the income people make would be insanity. Some of us tried doing that when I worked in a big hotel in FL, and it was funny how many of the "instigators" of this union push ended up fired or encouraged to resign within 12 months...
If collective bargaining in the traditional sense will not work, beat management at their own game and organize an impromptu "work to rules" workplace. If it is not written down as a job description or employee rule, don't do it. If you are part-time, refuse to board op extra shifts because it would make you full-time while receiving PT bennies (AKA none in this case). If your job description simply requires you to show up at remotes and do your on-air, do nothing else but that.
At least when they can you, the odds are you will collect full unemployment and may make the suits question whether they want to incur the extra unemployment tax involved in that. If most the staff is doing it, chances are they will at least listen to your demands before they tell you to sit down, shut up, and collect your $10/hr.
Its good to see radio is still the glamorous, thankless, highly underpaid, multi-tasking industry I left five years ago...not that I was expecting much different from a major radio broadcaster in the south!
Radio-X
(Now making a smidgeon more money in the glamorous, thankless, and underpaid world of hotels as a GM.)