We've somehow managed to get to the stage where GCSE's will soon be over. I'm aware the traditional "thing" would be Reading Festival etc but DS would rather chew his own foot off than go there. Smug DH and I congratulated ourselves on raising such a well rounded and sensible boy, for him to then mention he and a couple of friends would like to go interrailing in Europe instead 
Broadly I'm up for the idea and I've suggested things like age limits, whether his friends would be as dependable as he hoped and how much it would cost. Normally if my concerns were fully addressed I would say ok BUT they will be only 16.
At this point I'm not sure the idea will even take off but he's a determined bugger and at least one of his friends parents is likely to agree (or at least be in our position)
Are we insane to consider it?