I belong to one of only three clubs in South Dakota, but am a 2nd generation member. My father was one of the founders. We, too have this issue. Most members are over 50. Very few are under 40. We have our own 5-acre range, complete with cabin, target and primitive ranges, bow and hawk areas. We hold 2 rendezvous' a year and have monthly shoots. In addition, we demonstrate at 100-year and 125-year celebrations, we do youth events in the region (such as NRA Youth Shooting Sports working with the local NRA Rifle/pistol/trap club, and a "Do and Discover" history/nature event for kids). We have sought scout groups, asking them to participate in a weekend event, trying to tie into merit badges (both boys and girls) and we've pursued local high schools and colleges - all with almost NO interest from the respective groups. It seems the almighty Playstation or X-Box is too addictive for them to even think of leaving the house.
Sad, really. We see so many 8-13-year olds just LOVE shooting a muzzleloader during the shooting sports day, but their 20-30something parents just don't take an interest.
Did our predecessors miss the boat (some of which are still along for the ride today) by not remaining active in the solicitation of new members? I know our organization started slowing down participation in the mid '80s because they didn't want to do the "public" or marketing things anymore - they just wanted to have fun, then the 90's and early 21st century they found that everyone was getting older, no new blood. Our membership was much more active before, even though we now have a better range, closer to the main community of members, and are running 2 rendezvous' instead of one.
Seems that across the US, by scaling back on PR in the 80s and 90s, we now find that no one takes an interest in what we are doing in 2009...