Lots of times I get low energy halfway through my day at the park.  Most of the time it's due to lack of protein.  So, a turkey leg always helps my energy level.  And it's a lot of food.  I like to sit in front of Big Thunder or on Big Thunder Trail and eat one.  The downside is that at least 5 people will ask me where I got it from with my mouth full. 
 
I'm also a big fan of the soft serve yogurt at Gibson Girl.  There are also chocolate muffins that I like at Carnation in the mornings.