Don’s sleep score: 1
This is a fully-enclosed hut with water and toilet nearby. (At the temple above the hut, two minutes' walk.) However, there is a sign on the hut saying no overnight sleeping except in case of an emergency. It used to be common for pilgrims to sleep here (and some people still do) but someone stayed a long time and made it very messy inside, so overnight stays are forbidden. It may be okay to sleep outside the hut in a tent.