I have vacationed in the area a few times, in 1975, 1978 and 1985. Mount Shasta is in the area, as are a some new age and intentional communities. Most of the area to the interior is not forested and is covered with lava formations, buttes and ridges. It would be easy to hide in the coastal area but not further inland.
CNN reports now that Shane Miller's body has been recovered in the Petrolia area. It was found by a hiker.