I was just there yesterday, and go there often...
I ALWAYS eat at Voyager's Woodfire Pizza.(In the Waterfront area) It is cafeteria style counter service, no foil wrapped burgers or dogs in this place. It was $74 for 6 of us... 5 adult-sized appetites, and one child... including desserts & tax.
They have true woodfired pizza- a delicious sort of 'flatbread' style pizza... you get a HUGE slice (think 1/4 pizza) with fries (they've always had the BEST waffle fries, but for some reason yesterday they had regular fries... still good, though) for $6.99. They have good salads, pasta w/ different types of sauces, chicken, salmon, and fresh made desserts as well.
Kids meals run around $6... they get pizza or a hot dog or mac & cheese (GOOD mac & cheese), along with a drink, fries, and a box of raisins in a great take-home Shamu souvenir lunchbox (that is actually a worthy 'souvenir' of a child's trip).
For people with little ones... they also have Gerber baby food... happened to notice it while 'stalled' in line waiting for a fool in front of me who couldn't make up his mind.
Check out their menu on SW's website...
The deli at the Hospitality Center is always good too... limited food choices though, if you have kids. (Their only kids menu meals are PB&J or a hot dog.) But this is where the free beer is... so if you want FREE beer with your lunch, its a good stop.