Idaho hermit Richard Zimmerman, called “Dugout Dick,” recently passed away at 94. He is described in this article from the Idaho Statesman.
Zimmerman was one of a number of Idaho loners, and perhaps the last. He was entirely self-sufficient, living in a series of caves, growing fruits and vegetables, and maintaining a root cellar. Placed in an elderly care center recently by an acquaintance, he left of his own accord and hitchhiked back to his caves.
Article: http://www.idahostatesman.com/2010/04/23/1164899/death-of-caveman-ends-an-era-in.html
Video: http://www.imdb.com/video/wab/vi3045786649/ – link brought to our attention by a friend of Hermitary
Another video, from NBC News (local?) circa mid-1980’s: http://www.youtube.com/watch?v=KD53LVjXIHs