One piece of advice I'd give is to literally check out the testing center to see what types of paper they have. Everything i know of was laminated paper but I got a solid colored board that was pretty thick and durable so I could work with it without any problems. My friend on the other hand actually got two sheets of the clear plastic paper that they use to write on overhead projectors. Needless to say when he tried to map out his RC section it was so hard because he had to read through the sheet and deal with stuff on the opposing side. Do your research on the test site because you don't want to worry about a single thing on test day.
I agree, call the center and ask them. Once you do find out, practice using the laminated paper to prepare you for test day and there are no surprises!