Last summer while hiking out of the Sierras over Sawmill Pass I came across what looked to be the remnants of a grow operation. It was several miles from the trailhead and kinda creepy being that far in not knowing if there were booby traps or guys lurking about. We saw drip lines, buckets, cooking stuff and propane tanks. They picked a good canyon, Sawmill sees very little traffic now that it's unmaintained.
A few years back while crawling through old mines north of the Saline Valley we crawled into a large chamber accessed by a vertical shaft that was a meth lab, totally freaky coming upon what looked like a mad scientists lab 100 feet underground. When we climbed out of the mine we kept our heads on a swivel looking and waiting for the cooks to return. We beat feet and after a long soak in the hot springs I told a LEO about our discovery and he said the Inyos have become a popular place for clandestine labs. That was probably 6-7 years ago, maybe it's gotten better by now.