Profile for BroadwayDancerGirl2

I'll be driving in that morning...by the time I arrive the box office will likely have just opened. There is a possibility I might make it in earlier, just asking on the chances of getting tickets in the likelihood that i arrive around 10:30 ish! 

I'm planning to rush this show this Saturday. If I arrive at the box office around 10:30, what are my chances of getting 2 tickets for the evening show? Are rush seats still generally available at that time (including boxes) or is the line pretty packed?