I grew up relatively close to that part of the state and am fairly familiar with that area. I'm pretty sure there are no enviro-nazis or hippy protestor types within a 150 mile radius (or however far OKC or Dallas is). I would expect either locals in a rattle-can camo 1983 ford that don't like so much traffic on their trail, or somebody trying to cover drug activity close by. It's a bummer, I want to take my wife and kid up the trail, but unless I'm with a decent sized group, probably won't chance it.