Ben Johnson and Sam Bottoms are already gone. Clu Gulager is as alive as he ever was (not much, I guess) and John Hillerman is also still alive (in spite of a death rumor last year).
Great movie, though after watching all the extras, I now know a lot more about it than I really need to.
Ben Johnson was a really nice person from what I have heard or read. He was a real Oklahoma cowboy and had the best voice I have ever heard.