Jess is right. robvia and I are theme park commandos. We get there at opening and hit everything before the masses show up. When the masses show up we leave and chill back at the hotel to return later. The problem with doing both parks is those attractions that build queues early. If you go to IOA the Hulk, Spidey, Dr. Doom need to be done early. At USO Shrek, Mummy, Jimmy Nuetron need to be done early because by about 11 the lines are more than I am willing wait for. You could do IOA early and go to USO about 4 hours before they close?