i was in Thailand from 29 of december 2008-till 13 feb.2009 ,and last year from 24dec 2009-11march 2010
so in Bkk it wasn t a problem to find hotel to stay in New Years Eve,a lot of people,fun.
last year i spend New Years Eve on Koh Tao island-little bit problem to find free not expencive bungalow,but posible.i don t know exactly what you expect to find in Thailand -Bkk- but i can say that i like this country,people,food,nature,sun)
everyone,i think,can find here something that he like
good luck! almost 10 years ago