Hi Calgrl09!
Like lauradav said, good luck! Here are a few websites I found that might help you out:
http://www.calgreeks.com/recruitment/events.htm
http://www.calgreeks.com/chapters/sororities.htm
I actually helped our chapter out during recruitment one year and I was there for Preference Night. A lot of the girls were in cute dresses or slacks and a cute sweater. It gets a little chilly at night, so bring a sweater and wear comfy shoes! I'm sure any other questions you have can be e-mailed to the VP Membership or at Orientation. Have fun and be sure to keep us updated!