What are some quotes from Into the Wild that support the idea of McCandless being ignorant?

Whether or not Chris McCandless was completely ignorant and very lucky most of the time is up to each reader to decide.  There are going to be readers that find McCandless inspiring, brave, and highly intelligent; however, I do believe that Krakauer provides solid evidence near the end of the novel that supports the idea that McCandless was ignorant of how seriously dangerous his sojourn into Alaska could be.  Krakauer includes some letters that he...

Whether or not Chris McCandless was completely ignorant and very lucky most of the time is up to each reader to decide.  There are going to be readers that find McCandless inspiring, brave, and highly intelligent; however, I do believe that Krakauer provides solid evidence near the end of the novel that supports the idea that McCandless was ignorant of how seriously dangerous his sojourn into Alaska could be.  Krakauer includes some letters that he received from readers of his earlier articles about McCandless.  One of those letters includes the following quote.  

His ignorance, which could have been cured by a USGS quadrant and a Boy Scout manual, is what killed him.

While that is a brutally honest and somewhat harsh comment, I am inclined to agree with parts of it.  I believe that McCandless made an ignorant mistake by not taking a detailed topographic map with him into Alaska.  

If he’d known about it, crossing the Teklanika to safety would have been a trivial matter. Because he had no topographic map, however, he had no way of conceiving that salvation was so close at hand. . . Thinking that his escape route had been cut off, he returned to the bus — a reasonable course of action, given his topographical ignorance.

When Krakauer went to examine the bus where McCandless died, he brought some experienced woodsmen with him.  Upon examining the remains of a dead animal, those two men concluded that McCandless was ignorant about much more than just the local topography.  McCandless couldn't even tell the difference between a caribou and a moose. 

When I’d questioned Gordon Samel and Ken Thompson shortly after they’d discovered McCandless’s body, both men insisted — adamantly and unequivocally — that the big skeleton was the remains of a caribou, and they derided the greenhorns ignorance in mistaking the animal he killed for a moose. “Wolves had scattered the bones some,” Thompson had told me, “but it was obvious that the animal was a caribou. The kid didn’t know what the hell he was doing up here.”