Chiangmaier

Santai Muaythai suffered significantly from covid, many trainers have left, and they don't seem to prepare fighters these days. Their accommodations were quite good before covid, there was a newly built hotel right next to the gym, but I doubt it's still operational. As to Hongthong, there's an American woman who trains there and fights regularly. This, I think, answers your main concern. I cannot say anything about the gym's accommodations, but it's closer to the town and there are more options to choose from. Btw, check their Facebook pages. Facebook is the main social network in Thailand, and they share everything there.