Depending on the Panhellenic's rules, you may not be able to participate in informal recruitment. My school also had deferred formal recruitment (in January), and all chapters participated in informal recruitment in the fall. However, the Panhellenic Council's rule was that you had to have the opportunity to go through formal recruitment first- thus freshmen and transfers were not allowed to join in the fall through informal recruitment. We still invited them to get to know them better, we just couldn't extend bids. You may want to contact the Greek Life office to see whether you are able to participate- if not, you have an easy answer on your hands