The jump off point to Praiwan Rafthouse is pier at the Rachabrapha Lake (also known as Chiew Laan locally). You can find the turnoff on Highway 401 at Ban Takun. From the pier it’s is a 40 minute boat ride across the lake to reach Praiwan Rafthouse.
Longtail boat transport costs on the Rachabrapha Lake: In general the longtail boat fees are about B2,800 per boat one way to or from the pier. It may be possible to share that with other travellers.
Nearest airports:
You can fly from Bangkok to Surat Thani (one hour flight) and the airport is just over 100km away (about an hour drive)
Phuket airport is slightly further at about 180km and about 2.5 hour drive.
There are aircon bus services running every hour from both Surat and Phuket and minivan services too.
There are direct mini van services from Krabi (about 2 hours) and Takua Pa (about an hour) as well.
National Park fee: You are required to pay a B300 entrance fee for the National Park at the Rachabrapha pier.