What are some parallels in the story of John Waterman and Chris McCandless?

Another young man, John Waterman, is often compared to McCandless. He was a very talented young climber with a troubled relationship with his father, a tragic personal life, and a very eccentric personality. He became more and more unhinged, and eventually embarked on a borderline suicidal climb of Denali, during which he disappeared, and is presumed dead.