The place where you rented your vehicle will have the maps and answer your questions on how to get there. You should also go to the temple on top of the mountain overlooking Mae Hong Son around 5 pm and stay until sunset if you wish. Late afternoon is the best time for taking pictures of the valley below from this spectacular vista. Plan to leave early after breakfast and head north toward Pai. Before you leave the city go by the temple on the south side of the lake in the center of town to the old Burmese style temple behind the market.
Picture taking here is best in early morning.
The road to Pai is paved all the way but very winding with steep climbs. The views are fantastic. Your first stop should be a waterfall, Namtok Phasua. There is a big sign stating where to turn left. Follow this concrete road to the end where the Namtok Phasua Forest Park is located.