Let KAYAK do the searching
Based on KAYAK hotel searches, the most popular destination is Kanchanaburi (83% of total searches to River Kwai). The next most popular destinations are Sai Yok (9%) and Ban Kaeng Raboet (7%). Searches for hotels in Hin Dat (2%) are also popular.
KAYAK users have found double rooms in River Kwai for as cheap as S$ 9 (Kanchanaburi) in the last 3 days. The average price is S$ 72.