My husband Dennis, used to build the show benches from pine. We even stained them. He also used to hang vita lites above the birds. This is important to properly view the birds. You must also make sure there is electricity available and the lights need to be hanging above the birds, so you have to make sure that there is a place to hang the lights from.
Some judges like to judge a show straight through.
Some take a lunch break. Discuss this with each individual. Be prepared to have the judge's favorite beverage available at a table, close by. You try talking for 6 hours and see if you don't get thirsty. Also set up an account at the restaurant in the show hall for the judges and let the judges know that the account is set up.