I live in Thailand for 8 years and I've bought my 1st drone in 2016.
I've been following all the rules changing every year until today and I'm compiling every useful information in this ebook, because even with all the right documents, I have been arrested recently and went to justice court for flying my drone in Thailand, and I wish everyone to avoid this awful experience.
Flying a drone in Thailand requires lots of documents, it's tricky but it's not difficult and the whole process only cost 200 thb ($5 excluding drone insurance), and it can all be done online nowadays.
After that, you could fly anywhere in the whole country for 2 years renewable, even in the most famous national parks like Maya Bay or Similan islands!