There are so many first d's waiting to happen all over SE Asia it's ridiculous. Not sure if you are planning it but down south, near the city of Pakse, is a large volcanic plateau called the Bolaven Plateau, think PacNW but in the jungle. Rapids and falls everywhere. Lots of potential first d's, even right off the road. If you want some pointers for rivers over the border in Vietnam, give me a line and I'll send you a map and some info....
"Don't f$&@ing eddy out, just run it! Whaddya doin??" -LMyers