It's all over the map. The people who like dressing up, use it as the excuse to go all out. (Keep in mind that, of our six crown/coronation events every year, it's the only one that isn't a campout.) The people who aren't so much into clothes just wear what they usually wear. People who are brand new wear whatever it is they have. I do hope she'll be attending in company with some people she already knows because the event is notoriously ill-suited for breaking the ice and meeting new people. (In addition to the simple problem that everyone is rushing around madly all day, there are a fair number of people for whom 12th night is the only event they normally attend -- or who pick it for their "visit friends in the West" event -- so if nobody recognizes you, they don't assume that you're new and need welcoming, they assume you're some old-timer coming out of the woodwork for 12th night to visit old friends.)