SMU Panhellenic has a section on their webpage with descriptions and pictures of what to wear for each round.
http://smu.edu/fsl/joinPAN/PAN_attire.asp
I couldn't find anything on Arkansas recruitment attire, but their Panhellenic will most likely post and/or mail out that information closer to Recruitment. If you have questions send them an email. I'm confident they would be more than pleased to help you out.