Following is a link to one of the best history web sites I have seen about Alaska aviation. From what I know, all information is as accurate as humanly posable and needless to say, the photos are outstanding. A lot of work went into putting all of this information together, I know, I have been doing the same thing for my book.
The last photos of the C-133 working in and out of Umiat is where I used to live at one time.

If you enjoy the site, a kind comment to the site owner at the bottom of the link page would surely be appreciated I am sure and just tell him you found the link on Supercub.org.

http://www.ruudleeuw.com/alcan03.htm