Definitely take advantage of the early hour. The lines are so short and you can get several of the hot rides finished without the crowds. The day we did IOA was not an early entry, but I noticed they opened the park at 8:30 instead of the official 9:00 opening time. We rode the Hulk 3 times in a row first thing that day. When my son went back around 4:00 he had to wait 20 minutes (twice) in the express lane (using our FOTL HRH pass). The other line was 70 minutes. So, the lines are definitely a lot shorter in the morning than later on. Also, the FOTL entrance changed, in the morning we went up the exit area at several rides, then they opened up lines later in the day for FOTL. Also, the lines are not clearly marked for the express lane...it can be very confusing!! But it's a great benefit