I knew him as a golfer. When I was about 13 in 1951 or so I had a job as a caddy in a northwestern Connecticut golf course for a few weeks. My regular client was Hiram Bingham. I knew nothing about him although I learned about his political role; his golf partners were political cronies. As a caddy, I stayed mostly in the distance only being involved when there was a need so I didn't know much about him. He was a pretty good golfer and a very nice person. I never heard the term Machu Picchu spoken. (He did publish a Machu Picchu book in 1948 only a few years before this my encounter. I have out from the library at the moment.)
If you are interested in finding out more about Machu Picchu and Hiram Bingham I recommend reading Turn Right at Machu Picchu by Mark Adams. He tells a lot about the history of the place, Bingham's expedition, and his own more recent one. I just read it again. A fascinating reading experience.
This is a ~1931 photo of his taking off for (or returning from) a golf game via autogiro from Capitol Hill.
An early Bingham photograph of Machu Picchu.