Its not all just the young folk not wanting to get involved ....
For every kid, they need parental support to attend and get involved; and if the parents don't get involved, its really hard for the kids.
Even if parents grudgingly take kids along, its difficult for them if they don't have family or friends to actively support them.
So kids end up growing up without that opportunity, so inevitably their interest will wane. By the time they are able to do things for themselves they have moved on ...
My nephew is a case in point. He's really keen on S, bushcraft, and primitive skills, but his folks aren't and even when they take him bush, they can't really nurture him at all.
My kids: were dragged to the mountains, deserts and all corners of the continent. Now they are older, they say: "Its your thing dad, not mine" .... but at least I gave them the opportunities.
Sure its possible for those kids to grow up and then pursue their "outdoor" interests, but they are tech savvy (I hate that expression), and if your group is not 100% up with the appropriate technology, the young folk will struggle to find it.
This thread is a case in point. At the moment you'll need facebook and twitter and a "media" person to drive your event ... not just a passive web site ... connecting with young folk is all about media
e.g. 20 years ago a full page ad in a newspaper would get huge coverage. Today hardly anyone would see it and all those people would be an an older demographic.
Twitter/FBook - potential for huge coverage - different demographic ...
So my point is, if you want to grow and foster the next generation, you need to start with the whole family and the right technology setup .... that's just my 2c of pay-wave