I first heard of this from a Grant County sheriff deputy three years ago. He told me in no uncertain terms to be cautious when recreating out there. I met him through shooting and he told me that they don't commit crimes alone but rather in numbers. His point was that no matter how good you are with that gun you'll be outnumbered and outgunned. A friend of mine who's a rep for a firearms company did a training event for the regional SWAT's and security teams at Grand Coulee a couple years ago. He said that violent gang crime was a topic that day.