I am visiting IOA on June 17 with my family, which includes two boys - one who is really into HP and one who is really into the Marvel Super Heroes. We will not be staying at a Universal resort, nor will we have an Express Pass. Assuming that we will be arriving at the gates an hour prior to general public admission, would you recommend heading to the Harry Potter side first, or hitting the Marvel side and waiting until later in the day to do HP when the crowds will be less?