Well recently back from Cambodia, will put a full tour brief up next few days. Border info was as follows, The TM2 and TM3 filled in, also copies of your green book x3. Copy the very front cover, the owner page and the tax paid page. passport picture page, visa page and exit visa page. x3 also licence front and back x3. Take passport pictures. Have your green book, passport and licence handy. You can park right next to the check in place and everything is within 25m. Very easy.
Coming back in from Poipet, we stayed in a hotel right on the roundabout where the Cambodian passport office is 600bt, opens about 6am queue up for about 20 minutes to exit Cambodia, easy. Then on your bike down to the Thai office. Don't go into the office where all the people are walking, follow the cars going into Thailand, you'll get 2 pieces of paper from Chong Chom and a blue customs paper too. Pull up near the office window you see people stopping at, take your papers to the window with your passport and that's it, 15 minutes for 5 of us. Drive thru then on the right there is customs, give them the blue paper, sign your name in the book and that's it all done.
Reference Cambodian Police and lights. Well we went through 5 check points will our lights either off or covered over and only got the thumbs up from the Police and never stopped once.
So there it is from the horses mouth lol.