I rented a bike and then went looking out for it. If I remember correctly you go to the new waterpark near Pai, when you look at the waterpark from the road you have to follow it to your left. After one kilometer you will find a roadsign at your rightside saying lun yai view point. Just keep following the markers, beware the road is slippery. I didn't see any particular guesthouse or hotel near the chinatown / yun lai viewpoint I stayed at Tony Guesthouse in Pai.

It’s a small village in PAI Town, I don’t see any accommodation for visitors in that area. I believed U may arrange with your hotel or guesthouse for transportation. It’s a short drive or ride as it’s a small town. Usually I go there on my own transport either on a car or bike. These days the locals will set up a road block at the entrance, all visitors have to park their cars at the carpark lot and pay a small some of money for their service to drive u up to the TOP of the hill. Hope my reply would be a help to u. Have a pleasant journey!