My folks weren't deer hunters so a bit north of 50 starting about 1970. I did get my Dad out for a couple of openers when he was 78 or so. Older BIL must be pushing 65 openers. He is slowing down but still eager to set up in the hedgerow behind my pole barn.

Interesting Campfire demographics, especially this thread. Unless some of the younger guys aren't pitching in.