Hi! I flew into Bangkok from Cambodia and I'm coming to the end of my 30 days (visa exemption or whatever the correct terminology is). I understand from the very helpful people on this group that I can get a 30 day extension by going to the immigration office. I understand I need my Passport, passport size photo, copy of passport ID page and entry stamp, 1900 baht, and the departure card. My question is do I need to complete any paper work before I arrive or simply show up and join the que? Also, as the office is closed on Tuesday 29th, is it best to go first thing on Monday morning to avoid any large ques? Thanks so much :)