Ban Khiri Wong is at the foot of Khao Luang mountain and its national park, the best way to enjoy the place is probably to stay in one of the homestays to then go to discover the waterfalls in the park. Khiriwong is the starting point for treks too. The best time, when nature and waterfalls are the most beautiful, is from July to September. It is also the fruit season and Khiriwong is famous for its fruit plantations. The best is to stay at least 2 days and one night.
See here a list of accommodations close to Ban Khiri Wong Village
To go visit Ban Khiri Wong Village, you can also book one of the tours above.