The portions are large enough that you probably won't want seconds, especially when you consider that you get bread, soup or salad, main course, and dessert. Drink refills are free.
I don't think the food is worth what you pay for. It used to be really good, but it has gone way down hill recently. The last time we were there, I had the salmon BLT, and the salmon was really dry and gross. The fish and chips are the same fish and chips that you can get elsewhere in the park. The shrimp cobb salad is not bad, but it is not worth $30. I haven't tried the other stuff, so I'm not sure.