Fred Franz stayed at my mothers home for a couple of days when he came out to do a new KH dedication, probably mid-70's. My step dad flew him in from a larger city and then back later. I recall my mom commenting that he was a quiet, fussy, kind of little guy....very polite, but seemed kind of an "odd duck"! I could try and get a little more out of her, if there was anything more she might remember about him.
I later heard him speak at our KH, from memory, on the history of the org. Someone else mentioned hearing that talk from him, so maybe he has done it numerous times and that's why he knows it so well. My kids were young at the time and were afraid to go up and meet him after the talk! I was impressed that he knew so many scriptures by heart, as he never used a Bible at all, probably due to his failing eyesight at that point.