I have read "Into the Wild" and just finished "The Final Frontiersman".
While the two characters fates are completely different, the common bond they have is the desire to live life to the fullest, in a rugged setting and in a simple way.
Heimo, the guy in the "Frontiersman" had a little less "romantic" view of the Alaskan wilderness and even with the help and tutelage of some seasoned trappers still almost died numerous times before he got it "right".
The kid in "Into the Wild" just got in way over his head in a land that can be as harsh as it is beautiful.
In the "Final Frontiersman" they talk about all the "hippies" that came to Alaska to live there dream, most didn't last long, many suffered tragic fates and a few managed to survive and prosper.
They talk about the size of the Alaskan Bush, its like a small country.
Remote and unforgiving even to the people who call it home.
While I admire anyone who seeks a great adventure, there's a fine line between that and reckless behavior

The kid in "Into the Wild" was simply over matched and unprepared for the Alaskan Bush.
Great story but there is a lesson to be learned from his fate