https://bubs.my/blog/2018/6/16/luang-por-thong-daeng
there is infor about LP Thong Daeng and his monastery here.
Dhammayut nikaya in Thailand
Re: Dhammayut nikaya in Thailand
It is called Wat Pak Piang. It is just past Luang Por Sim's temple. It is on the right side. You just bear right on the road instead of going to LP's' temple and its on the right. There are nice caves to meditate in there as well.