It's not far from Pai and there is no accommodation at the hot springs. The easiest way to get there is on a bike or in a car. If you don't have transport, then you can rent in Pai at reasonable rates or you can join one of the many excursions that take in the various points of interest like Pai canyon, the land split, etc. Pai is a definite must on a trip to Thailand.

7h00-20h00

It opens around 9 I think but closes at 18h according to the sign and schedule. I stayed today till 19h and there were a few people left, but anyways it gets dark by then and mosquitoes attack:)