Highly recommend reading the book by Jon Krakauer. One of the best books I ever read. I can’t remember if this comes up in an afterward from an updated edition, but Krakauer visited the bus. Apparently that location was well known to locals and very close to a road. McCandless isn’t as far removed from the populous of Denali Borough as the movie makes it seem. Of course this was unfortunately not known to McCandless, as it seems, based on his journal writings.
Krakauer at one point relates the story of McCandless back to himself by including a chapter about his time climbing Devil’s Thumb (Taalkhunaxhkʼu Shaa) in Alaska. That is whole-cloth an essay he previously featured in his first book Eiger Dreams: Ventures Among Men and Mountains. Of course this next part goes without saying: the book is better. There is lots more of McCandless’s life documented in the book that doesn’t fit well for the movie’s narrative.