There are few experienced stargazers in Thailand. It might be true that the experienced stargazers are bored with joining TAS' star parties. An essential fact is that most stargazers love calm and privacy. So they choose to arrange their own trips instead of joining a crowded party after they can learn by themselve. Even me, sometimes I find an occasion to go out and sit under the dark clear sky alone.
Every star party has a brief preliminary training for beginners.
At least you will be taught how to use the star map. The number of attendees usually fits in a bus, or 50-60 people. Any question is welcome. I enjoy reading and answering questions. Thai have a set of constellations as well.