hello -- i'm heading off with a group of friends to southeast asia this winter. they, however, are only keen on going for two weeks, maybe three, whereas if i'm going to pay 800 dollars to fly there i want to stay on for a little longer. so i'm considering taking a tour, hopefully an eco-type tour that would be targetted at young(er) people. i know there are a number of such tours in europe from my travels there but i'm not sure if asia is considered enough of a hotbed for young people to target them.
we're mostly going to be spending time in thailand, which stops planned in cambodia and southern china, so i would prefer a tour that would take me to another country or two.
if anyone has any advice, it would be appreciated, thanks!