Yes, this was before the interwebs. He may have had quite the audience nowadays? He did have an audience in local nature and hiking clubs etc. that would host his presentations. I am just bitter, because every time we visited him, he'd give us a 2h show. Not your focus when you are a 10 year old boy.
When he died, there was a truck load of negatives and slides and no place for them to go. It was sad ... and the other reason why I think you need to have your hobbies mainly for your own enjoyment. If you can get more out of them, more power to you ...
G