Profile for Mellypage

I am coming in from out of town and I am hoping to make it to the Escape to Margaritaville Rush. Does anyone know how early (for that particular shows rush) you have to get there to be sure you get the rush tickets? I remember a while back I went to a rush for Legally Blonde and I got there an hour before the box office opened and I was unable to get tickets. I tried years later for student rush for Rock of ages and got there 3 hours before the Box Office opened and nobody was there. Any info...