I sound like a broken record, but the parking garage opens at 08:00am, and there's usually a line of people there at 07:45am. I park, or walk over from the onsite hotel and get to the gate at 08:15am and wait. I'm always first into the park, where I get a front seat ride on Hulk.
Even if you have FOTL, it's still a good idea to show up early and get the front seat rides on the coasters, plus a ride on Pteranondon Flyers.
The masses of people show up at 11am, the walkways get crowded, it's hot, and I leave from noon to 4pm.
You can do this plan any day of the year, and you'll get a lap of walk on rides, even if you don't have FOTL. At Disney it doesn't work because their rides have longer pre-shows, but at Universal you can get on each ride with no waits and keep moving.