I recommend modifying the placement of the Chris McCandless placemark, as the position mentioned in the first post is off by 12 miles.

A position of 63D51'58"N 149D44'00"W would be much more accurate; this should be within 1/2 mile of the bus.

Although I haven't been to the bus, I'm certain the coordinates 64N 150W are only approximately correct. The confluence.org website notes that the bus is "within a few miles" of 64N150W. Working from a map that appeared in "Into the Wild" and the descriptions in the book, it is very clear that the bus is along the Stampede trail (visible in roads layer) near the intersection of two smaller streams just before the Sushana river.

Modifying the first placemark will avoid placement of duplicate placemarks.