Great find and a great story. Growing up and living my life in the eastern US, I never knew any Navajo until we took a trip last spring to Arizona and southern Utah. Our Navajo tour guide in Monument Valley was a former Marine. Very proud and very patriotic. He ended up being typical of all the ones we spoke with. Just a bunch of great people.
In 2007 I was working on a Florida Incident Command Team on a fire in Montana. One of the Situation Unit Leaders (mapping guys) was a Navajo, probably in his fifties at the time. I remember having a small conversation about the Code Talkers. Unfortunately the details are lost to time, but I enjoyed working with him.
In 2015 we also did a family vacation out west. Heading from Colorado to the Grand Canyon, we saw signs for a McDonalds (I think it was MDs?) advertising a Code Talker display. Made it a point to stop to see it - had a glass case display along with plaques, pictures, and memorabilia. Interesting place to see that type of display.