This topic is making me hungry and everything has WAAAY too many 'points' for me (for any of you WW people, you'll know what I'm talkin about).
Anyway. I have to agree with those who mentioned:
Knott's Berry Farm for their Fried Chicken, Mashed Potatoes and most importantly BISCUITS with boysenberry jam! I could eat just those and be happy. I also like the boysenberry punch and their funnel cakes when they make them fresh.
My other favorite theme park food is at Legoland in Carlsbad. The Market at the back of the park usually has some great choices made fresh and they vary from visit to visit in my experience.
In Downtown Disney, Anaheim, I love the Beignets (not sure if that counts as a theme park food or not)
If Food Network needs any help, eating or otherwise, send them my way!
jen