Nam Tok Nadeuay is not in between Sangkhalok and Bane Khoy. From Bane khoy to Sangkhalok is about 1.5 km. Nam Tok Nadeuay is about 4.5 South of Bane Sangkhalok. It's about 12km from downtown of Luang Prabang, not 5-6 km. From Downtown to Bane Khoy is 6km and from Bane Khoy to Nam Tok Nadeuay is 6km.
Khon Luang Prabang in the U.S. sorry I have no lao keyboard to type lao.
Now it's evry beautiful, nice modern road to there it wasn't same before with small rocks and dirt road. The tourists like this place not more than Kuwangsi. Go check it out!