If you are thrill ride fans, the reason you want to show up early is to
1. Get a front seat ride on Hulk with no wait.
2. Get front seat rides on both sides of Deuling Dragons with no wait.
3. Get a ride on Pteranondon Flyers before the kid rule goes into effect.
Basically, you show up at 08:15am, get in line at the front of the gate, go in first, and run to Hulk. Then you continue to PF, and to Deuling Dragons. After that, you do the other rides.
Eating lunch at 11:30am is a great idea, because most people get hungry at noon, and flock to the food places. Same thing with dinner. Everyone goes to the restaurants at 6pm. If you go at 4pm, you get happy hour drinks, and a short wait.
The other reason to go early, is the walkways get very crowded at noon.
I go back to the hotel room, and rest for a few hours, then come back as the tired are leaving.
One more thing, June early July is very HOT. If you sleep in, and show up at 11am, you'll wilt under the sun. The idea is to show up early, take a lap, go back to your room, rest, swim, then come back at night, because the parks stay open until 10pm. You'll enjoy night time the most with your FOTL.