Is John Krakauer a Credible Source?

There is no doubt that John Krakauer has experieced some of the trials and the emotions that Chris McCandless went through, but is he a credible source for McCandless' biography of sorts?  Does Krakauer's experience destroy any chance that he may view McCandless objectively?  Obviously, Krakauer acknowledges that Chris was a trouble young man and full of angst, but does he give due credit to Chris' family?  Throughout the book, I feel that Krakauer dismiss many of the emotional arguments that Chris' family and friends have in favor of Chris' own emotional turmoil.  In this regard, I feel that Krakauer cannot view the effects that Chris' actions had on his famlily, nor can he adequately encompass their emotions as weel as he could if he had not experienced the same things as Chris. 
Even though Krakauer is partial towards Chris,  I believe that this favor is well placed.  Judging from Krakauer's experiences on the Stikine Ice Cap,  he knows the feelings that Chris had on his odessey.   Krakauer seems to give insight into the kind of mind that would neglect human company in favor of danger, nature, and isolation.  Knowing the motives that drove Krakauer, his adolescent focus on climbing,  makes Chris' hazy high school and college years become more understandable, if not reasonable.  With Krakauer's own fatherly troubles, Chris' relationship with Walt also becomes more clear. His line that "male authority aroused in me a medley of corked fury and hunger to please" in incredibly insightful as to how Chris viewed his father and other men, possibly Westerberg.  The emotional connection between Krakauer and McCandless is palpable and insightfull to say the least, but did it convey Chris' story in the most accurate way?
Was Krakauer the best man for the job?  Would Westerberg or Carine have been about to offer a much more emotional and insightful sorry?  I don't think so.  I believe that Chris was such a mysterious and confusing person that knowing him personally made him all the more mysterious.   Krakauer knows the experiences that Chris went through, and knows the emotion tied to is.   Those closest to Chris, I believe, didn't see the side of Chris that saw his Alaskan adventure as reasonable and vital.  Maybe there was a duality in his identity divided between what people see and what is there when Kris is alone.  Krakauer can identify with both of these identities like only a few others can.  Ruess, McCunn, Waterman, Rosellini, Tolstoy, Thoreau, or even Timothy Treadwell could have given insight much like Krakauer, because they all experienced the drive that Chris had to go into the wild. Interestly enough, they are all men, but that will be my next journal.