They were doing "test" runs all day when I was there on Thursday. Not sure if it's still going on (it should be), but no special pass was needed.
I'd definitely hit that and The Simpsons right away before heading down to the bottom lot. I rode it right around rope drop, and there was only a 5 minute wait. By noon it was about half-an-hour wait, and mid-afternoon it was 40-50 minutes. Second longest wait-time after The Simpsons.