Over on youtube there is a seven part interview of him in the early eighties when he was guiding in the Tetons. You can tell that it was torture for him, but he chugs beers and makes it through the ordeal.
I remember turning 18 in the Moose Bar in the tetons and going to the bar for my first legal beer. It was in the middle of the day and Pratt was the only other guy in the bar, a few seats down. He seemed to be deep in thought as he nursed a red wine, so we didn't bug him, but of course we recognized him.
It's funny in that interview, because he looks younger than I do now.