Oh good luck!
Okay, wear comfortable clothing, that shows your body figure. Like, active wear. Just so they can see how you move when you do the dance portion.
Wear little make up, with your hair pulled back, and if you wear glasses, don’t wear them to auditions.
Be as silly as you can be. They are looking for outgoing, animated, fun, people. Don’t care about how you look.
Smile, smile, smile.
I would suggest bringing water, and any kind of dance shoes you may have (jazz preferred).
Um, I can’t really think of any more at the moment, but if you have more questions, just ask :)