We ended up stopping by OC Rotisserie on the way in and had two great banh mi sandwiches. The #1 Rotisserie Chicken (with fried egg for +$1) was great. One of the best I've personally had. The Lemongrass Tofu was also good, especially the sauce. Regretted not getting egg on that one too.
In the park, we had the corndog. I never had the old all-beef version of the corn dog that @attran99 mentioned, but I think the current version(s) are still pretty solid. Maybe it is that batter. We had the hot link and the original. I'd probably declare the hot link version the winner, but the dog itself seemed a tad dry compared to the original. Also had some seasonal drinks from the festival stalls that @JRSD mentioned. The egg nog cocktail is just the pre-mixed Pennsylvania Dutch with whip cream on top. It is festive, but I'd avoid, especially for $11.50/glass.
Struck out twice on the way home. After realizing we wouldn't make it to @js76wisco's suggestion of Brodard, we tried to order a Tony's deep dish for takeout (per @lectroid), but forgot that deep dish takes 45min, which was a bit too long of a wait.