I don’t know all the regulations however, I have yellow book and pink card. My local DLT says that I need a visa and, even with my IDP I was required to watch the online video to get the QR code.
There is a massive market on the river front that I really enjoyed and, I remember there was a really good Vietnamese restaurant on the esplanade plus the big colourful dragon statues. I was only there for a couple of hours but I’m sure there is a lot more to explore.
I have no doubt but, my wife has this house in BKK where we are currently living however, I would like to visit Hua Hin sometime soon, maybe catch up for a beer and swap a few stories?