just a quickie guys:
dont use TAT in thailand, their the goverment tourist agency - they ripped me off big time and from what ive heard on my travels theyve been ripping loads of people off. i landed in bangkok, jet lagged and a tut tut driver took me to one of their offices, they were friendly and seemed good, so i trusted them, the guy was telling me not to go to cambodia or vietnam becasue they were dangerous, RUBBISH! he told me that koh chang was impossible to get to and very expensive , again... rubbish, i ended up just booking my accommodation after he tried selling me flights, tours, private taxis etc, when i left i realised that i had paid a whooping 75 british pounds for 6 nights, when it should of cost me about 20 pounds! so there you are guys, shop around, walk out if it sounds to expensive and just DONT TRUST THEM! you could say that i shouldnt have been so naive and stupid - but i amde a mistake and hopefully you wont do the same!
hope you take this advice, and travel to cambodia and 'nam, their amazing countries!!
all the best