Have fun with your pref night dress. Yes, Arkansas tends to be on the more formal side. However, show your sense of style. You want to stand out. That doesn't have to mean gaudy sequins (although you will see some sparkles around) but find something that is unique. A fun color can also make you stand out among 1300 girls. Don't be too stuffy!
http://http://pinterest.com/pin/248260998181582083/
I have also noticed that Pinterest has become a great resource for recruitment this year. If you are on it you can search for outfits, conversation tips, etc!
Good luck! Go hogs!