Just a friendly reminder: when you're packing your cosplays for the cosplay contest be sure to include your costume documentation. (for costumes being judged)
What's this? It's the pictures you used as references when you were making your costume.
Why? Because although the judges are otaku they are not familiar with every costume and sometimes they forget what a particular character is supposed to look like (quick - how many buttons does Vash have on his jacket? *I* have no idea, but if you show me a photo, I can tell you
)
NOTE: you will be holding on to your costume documentation the whole time - the only time it will be out of your hands is when the judges are looking at it. Thus, you won't have to worry about a valuable art book being lost because you have it with you.