Woolite, the traveler's best friend. Did the laundry in the sink, hung the clothes in the hotel room and generally they dried in 24 hours. Took a single carry-on backpack for a two-week trip to Spain and Italy and did just fine.
I did that in China, but when you can have the resort clean, fold, and press the entire load of laundry in an afternoon for under $10....
I love Thailand.