I don't know a thing about recruitment on your campus, but here are some similar threads with links and advice:
http://www.greekchat.com/gcforums/sh...d.php?t=124301
http://www.greekchat.com/gcforums/sh...d.php?t=134552
Now that you have acknowledged the potential challenges your class standing and GPA
might pose, just focus on the aspects you can control (like recs, for example, from people who can highlight your strengths), and then move forward with no regrets.
The only outcome anyone can predict with certainty: The only way you will never be Greek for certain is never to try.
Good luck to you!