spook12,
I think you're right on regarding the enforcement. There are a bunch of laws that are a real bitch to enforce.
I think this is similar to MT's law regarding the use of 2-way communication for hunting. You cant use radios to guide hunters into game there, but how do you enforce it? I suppose, technically, a warden could use some sort of scanner.
I also believe Ben is right on regarding who sets land use rules VS. who sets game laws. There is a distinction, but I agree with you that lines get a bit blurry at times. Wyomings Wilderness Guide Law is a prime example. There really isnt a land use restriction per se, because you can use wilderness in Wyoming without a guide all day long. You just cant hunt game animals in one without a guide.
IMO, the drone regulation is the same. The Federal/State land management agencies arent saying you cant fly a drone over federal land. However, the State is saying that if you are doing so to scout, hunt, or utilize them in the taking of game in any way, you're in violation. Again, like you stated, enforcement is always going to be the real challenge.
I think about the only way it will be really enforceable is if its discovered in an under-cover operation, if violators are turned in, or if they're dumb enough to fess up to using them for scouting.
Thats one of the problems that wildlife face, IMO. There are lots of laws on the books, but not enough wardens/law enforcement to really enforce all the rules. I'm not saying that the laws arent important, they are.
Sportsmen need to have (basically) a ZERO tolerance policy when they witness wildife related crimes. Make the calls...its YOUR wildlife that will suffer if you dont.