Although I cannot say that I've actually taken my own advice
, I strongly advise that you set aside your past rush experience when making your decision about which sororities to approach. For one thing, you do not know why you were not invited back to a particular sorority. The factors that excluded you before might not be factors any longer (ex: climate of Greek Life on your campus). Also, by only looking at the sororities that were on your campus, you are seriously limiting your search. Again, I'm not following this advice because I began the AI process with the precise goal of joining an individual organization for very personal reasons. Although I've learned enough to know that there are many wonderful NPC orgs, I have chosen to follow through with my original search until I am sure that the door is closed. If you don't have a connection to a particular group, then I suggest that you research all of the organizations before choosing one to approach.
Best wishes for a successful journey.
LM