How many are you bringing? I wouldn't wash them later than Wed., even that is a bit late. They need to be able to preen/reoil their feathers and look natural and takes a good three days. I remember at the Pima County Fair, my RIR won over the White Rock, belonging to you know who, which really surprised me. Gene Helton was judging, he didn't know it was my RIR but later when I talked with him about the show, he said he told James it looked like that White Rock had been washed the night before and James said, yes, he had. Amazing the judge can tell that.