R.D Campbell and those rectangular cardboard cards seemed to work well. One advantage is that you can update a portion of the brief without having to rework the whole thing. Just edit the card or replace it. Also they fit into a shirt pocket and are quite unobtrusive when you are in front of the board. Stor in little plastic box with rubber bands and card index.
Not up to speed with the JAR long briefs specifically so sorry if this is out of turn.