I agree with all the tips on here. Ours is get there early, take a break during the day, espcially the summer months, and stay late you'll be suprised at how much you can do.
Not that this is a DL tip but always be prepared, its seems like your doing a good job of that already.
Get priority seating for your meals. I know this can take time out of doing as much as you can, but I believe the meals are much better value and so much nicer then some of the counter service places.
Plus it forces you to sit and soak everything in for a little bit.
Eat the fried chicken at the plaza inn.
The dinner will feed two people easily, and if the kids are little, perhaps 3 of you.
Also i keep a few smaller size paper plates in a ziplock in my backpack to make kids meals from my plate.