Surely you realise the problem of trying to cater the needs/wants of people from 12-18? The change you go through in that time period are massive. So it is very unlikely that the RSPB can put something into the pheonix mag that suits both a 12 year old and an 18 year old.
Just wondering, how old are the current teenagers moaning about the pheonix club?? My guess would be towards the top end of that age group and starting to take birding more seriously than when they were 12.
It would be great if they could still organise something like this. But I fear society no longer lends itself to such activities. Even if someone on here was to organise a holiday/trip, if something went wrong a claim would be coming your way. It really is a shame it has come to that sort of thing. You have also got to think, while you might be perfectly respectable and serious birders, you might get people on the trip who are just there for a week away from their parents and are intent on just messing about.
Best thing for it is to pick a few people, either from on here or who you know already, orgainse buying a cheap tent and going off birding for a weekend or week. Either get your parents to drop you off or take the train. That way you know who is going to be there, that you will all take your birding seriously (yet still have a laugh of course) and you are not dependent on what activities the trip organiser has planned for you. ie. if something turns up you can go twitch it. Get about by foot, bus or taxi and pick where you want to go each day. Either that or pick someone who has a car and chip in for petrol money.
While it would have been good if you can organise a group into double figures sharing a hotel, the logistics and organisation of it would be a nightmare.