the Maine Hermit has him beat by a long-shot - 27 years in the woods before being caught. and Maine isn’t nearly as rugged as the northern Rockies or nnmapped areas of California
https://www.youtube.com/watch?v=FxBT5nuWwIU
And of course, the Unabomber was off the radar many years, but I don’t know if the locals knew about him, just not who he was.
Ya, but...........in those 27 years, he did cross paths with a hiker once. How’s he doing, by the way?