A good question worthy of further research by someone in the S gauge segment.
Although it probably wouldn't be an easy task, it would be great if someone could locate one or more of the "boys" and gain some insights to the show and the participants. It's likely that one or more would still be living.
Even though I have always been a Lionel guy, dating back to the age of six or so, I do have and enjoy the American Flyer Boys Club segments. Unfortunately, I only have the VHS versions available and no longer have the means to view them. I guess I should see if Cari, on our staff, can convert them to DVD. Not sure, but perhaps DVD versions are available from TM Books & Video.