It will be busy, but you should be able to do everything in a day - especially since you are commando types!
Summer hours should be 9:00 a.m. til 10:00 p.m. One thing to be aware of is that (at least in past summers, and I'm assuming this summer won't be any different) they have special versions of the Shamu and Seal and Otter show at night, and those are worth seeing, even if you saw the daytime versions. They had to stop doing the nighttime fireworks last year because of possible pollution in the bay, and as far as I know there still won't be a fireworks show this year.
When you get to the park (or before you get there check out their web site) and look at the show schedules and figure out what you want to see and when. The show schedules are NOT set up for you to "logically" proceed from one to another, so you'll have to pick and choose. You'll probably want to arrive at least 30 minutes early for each show to get a seat.
I haven't eaten there in a while...as I recall most of the restaurants are buffeteria style, though I think they are pretty good (the Shipwreck Cafe and the Smokehouse place, at least) for theme park food. I think there are a couple of counter service places, too, but I don't know how the food is.
You'll probably find that the park clears out a bit in the late afternoon when all the people who only came for the day go home, so you should have a little bit of time between afternoon and evening when hopefully the lines for the rides won't be quite as long.
Hope that helps.