Have some Rainbow Warriors in #16-20, Surveyors same size, Girdle bug in brown/yellow with yellow legs. I have had good luck lately with leech patterns in the #6-10 range.
A lot of your success will be determined by your beat. I judged this comp a couple years back and a couple of the beats were very productive while others were almost barren of fish.
Some beats need to fished fine and far, while others need to be up-close and personal.
Good luck and I might see you there!