Kayaking - Rafting in Kaeng Nam Wa.
First I have to say I'm not a sport person at all. But well.. if you come to Nan and you don't go rafting that's like missing something.
Kaeng Nam Wa is one of most popular destinations for people who love adventure of kayaking and rafting (Or those who never tried before but would love to)
Trips available from One day trip to 3 days trip. Rafting along Kaeng Nam Wa (80 km long) which there's 3 different level. Easy, Hard, and a little bit danger. (But don't worry, no record of tourists were injured)
You can contact tour operators in Nan for trips. Several days trips you might have to camp in National park or bangalow (but they will manage that for you)
Scenery while you're doing your rafting is breathe taking. You don't need to roll all the time some parts of the river is very calm you can see bright green seaweed in the river and green jungle that was so beautiful.
Should check the season before you go. Some time of the yeat river is too dry to go kayak, Best time will be rainy season.
One day trip should be about 1200 Baht/person/day
and 2-days or 3-days will be around 3000-4000 Baht/ trip include food/ accommodation.
More people --> cheaper. You don't have to prepare anything but clothes that dry quick. Some snacks if you want. All the gears such as life jacket, etc they'll have them ready for you.