I met him around 30 years ago on Martha's Vineyard and he couldn't have been nicer.
One of my brothers had bought a used 1974 BMW 2002 from Reasoner's daughter in CT (Westport iirc). Soon thereafter, that brother managed to get the car sideswiped by an 18-wheeler, which scraped up the entire passenger's side pretty badly. He didn't want the car any more after that and sold it to me for something like $500.
I loved the car--despite the scraped-up side--and brought it out to the Vineyard, where I was living and working that summer. Harry Reasoner came in with a group of people to eat at the restaurant where I was tending bar, so I had the waitress bring him a drink on the house and tell him it was from the bartender who owned his daughter's old BMW. He came up to the bar to thank me afterwards and was very gracious. He laughed about the car, said he had bought it for her, and that she wanted to sell it once the heat stopped working. I told him the heat turned out to be a cheap fix, but the car had been side-swiped since.
I recall he was wearing a green sports coat that looked like the one you get when you win the Masters.
When the car finally died I kept it at my parent's house and put an ad in the Bargain News to sell it for parts. I actually made money on that deal because so many people came by to buy certain original parts off it, and one guy finally took the whole thing away for my original purchase price even after it had been scavenged for weeks.