Id like to echo Fionn's reply (which was very well written and I feel addresses many of the common facts that face todays 20 somethings.)
Like every camp the two biggest issues we encounter is recruitment and fitting in with the guys. Luckily we have 3 guys in our roster of 12 who are under the age of 30, so things are looking up for the long term survival of the camp. But it is very hard to find someone who seems to fit in with a group of guys who have known each other for 30+ years. Our camp is very organized and our primary motivation is the hunting, so you cant bring up a group of guys who are looking for a week away to just drink beer (which is ok, but its a different type of hunt).
Of three of us who are under 30, we all turn off our cell phones aside from the times we call home (for a mid week hello to the wives). Depending on how individuals are brought up really dictates they're dependance on modern amenities.
A young guy who hasn't been raised with the enjoyment and serenity of the woods is unlikely to appreciate the "getting away" and is equally unlikely to hunt. So we can take all the pot shots at youngsters today, but its really not fair game.
The hardest thing for me, is the time away from work. As a guy who is a relative junior in our company, I only have a couple weeks vacation a year... Now Id love to spend EVERY minute of my vacation time hunting but it really isn't a realistic practice.
I hunt deer every year at camp, and ensure I'm committed for a full week. But to try to throw an additional week of moose hunting in there isnt in the cards for me YET. I really cant afford to pay for the expense of another week away from work, in combination of the price of food, fuel, butchering, etc. At this stage of the game I will have to pick my battles. I suspect for many younger hunters they are in the same boat.