Did I miss something?
The guy was walking down (or across) a R/R track, on the way to his truck. The only Witness was Officer Chris Nix.

If it happened that way, the charge was bogus.
Wearing camo and carrying a rifle does not mean he was "hunting" from the R/R tracks.
The judge claiming the AG's opinion irrelevant is BullSchit!
The AG opinion was specifically applicable in this case.

I also happen to know and respect Chris Nix. He's an intelligent and energetic kid with good old fashion common sense. Like any of us, though, he can be wrong sometimes.
I figure it's like this;
A) There's more to the story than we've heard here.
B) Chris misinterpreted the intent of the law and made a mistake.

If it is illegal to wear camo and carry a gun across R/R tracks, then there's about 8,000 acres of the Lowndes WMA that is simply not accessible to hunters.