@Christopher *****
If I were you, I would search for necessary documents first, unless you love going there. You'll usually need copies of your passport (info page + last stamp), copy of your visa, copy of your TM.30, last TM.47 slip (if any), and sometimes even a copy of evidence of your address on top of the TM.30. There might be other documents needed in Chaeng Watthana, no idea, do a search.