With enough volunteers, or enough time, you could do these all by hand, rather than print or copy. Decide on categories. Print judge's ballots. I've used long strips of card stock or heavy stock. The first couple of times I printed on the end with a little home screen printer I have.
Strips are easy for outdoor lap-writing.
The problem with regular-weight paper is that people won't be able to write on it without a desk, and by firelight they would see the markings from the other side, the pencil would poke holes in it, etc. Use heavy paper if you can. You could do these all by hand too, pretty easily. Gather up lots of pencils. Be sure you have a time and a place scheduled, and have someone in charge of getting the fire lit, and announcing that it's time to gather.