Jeff Cooper, at Gunsite and a few other places. Skeeter Skelton, the morning after he got the American Handgunner award at an NRA convention (1976?). Cooper answered letters, Skelton didn't!
I saw Skeeter Skelton sitting in the SHOOTING TIMES magazine booth. He was, I knew later, a bit "worn out" from the previous evening's award dinner and celebration. I walked up to him, introduced myself and handed him a catridge I had with me. A .44 Special with a cast SWC bullet. I handed it to him and said, "Seven and a half grains of Unique." He looked at it, looked at me, looked around and said, "Let's go find something to drink." We went to some hospitality room, got coffee and a coke and talked handguns for almost an hour. I was a college kid and didn't know a lot but he treated me like an old shooter buddy. He conversed just like he wrote. It is a favorite memory. He was a tall guy, a lot taller than he looked in the magazine!
Gary Nixon, Dick 'Bugsy' Mann, Cal Rayborn, Kell Curruthers, Gene Romero, some others from that era.
Ronald Reagan at a state party convention the first time he ran for the Republican nomination for President.
Shirley McClaine flipped me the bird once at a George McGovern event.