I think the real problem is you're preaching to the converted Wayne - this bunch (myself included) are either doing stuff or have done it and now no longer want the wet, cold, pain etc.
I am told by the younger ones that forums are dead and social media is the only way to reach them. I'm also surprised to frequently come across younger people (under 30 and some nearer 20) that would really like to get into this stuff but can't find an avenue. From a business prospective it's no different to any other marketing problem: what do the prospective customers want, do we have products that satisfy, are we in a place that can deliver, can we meet the pricing expectations? When I was in business (in a formal way as opposed toe the ad-hoc stuff I do now) we had weekly review sessions where those and other important marketing questions were discussed and actioned.
I will now confess, that having just come off a trip canoeing down the Spey, I realise my days doing what I really enjoy are limited (I cannot kneel anymore which makes rapids 'interesting') - I have to accept that maybe sitting around the campfire talking about past exploits may be the best I will be able to do soon - but I'll still be lighting fires, chopping wood, cooking in the open - even hunting and fishing etc.
Well hopefully you can find a nice place by the fire with a few friends.