According to the "The Nation"... " The red-shirt leaders were taken to be detained at the Border Patrol Police base in Hua Hin."

http://www.nationmultimedia.com/home...-30129767.html

I hope that doesn't mean that Hua Hin might attract the attention of demonstrators following their leaders. On another website there is advice to tourist to go to Hua Hin in order to avoid trouble in Bangkok.

Hua Hin seems to be the place to go...