Okay, where the hell are they? I just spent like, an hour going back and forth between Highground and Muck, checking the claim markers. I'll come to the defaced ones and it'll say something like "You check the markers but see nobody around". Argh! Don't care about reward, just want to get the stupid quest crossed of my list!
And speaking of which, I've found the 3 northwestern Vahnatai control panels but I can't find any in the southeast... do you have to travel down the Dark River to find it, or what?