At this point you can either open the bardic for general performance, and let the judges sit as long as they need to, or you can request repeats of some of the best-received entries. To tally, you only need to list the numbers which got votes. Before court, pull the cards of the winners and put the number of votes received somewhere on there. You might announce in court who came in second in each category too. Advantages Judges pay more attention than they would if they were just observing.
Entrants can also judge.
Entries don't have to be categorized in advance. Someone entering a piece which could fall into two different categories doesn't have to pick one or the other. It's not much work for the organizers or judges. The method makes for such a group effort that everyone involved feels involved in the process. Many people win, not just one.