As you go to Rodeo, there are actually plenty of food to choose from.
We ended up eating at the Carnival part of the park...
... which are all fried bad choices. We got the Jumbo Corn Dog. It is basically a foot long corn dog. I was grateful that the batter they fried it wasn't thick, and made it a tad crispy even. That was a good thing.
I want you to know that they do have decent food between the Agventure and where the Carnival begin. There's a row of food vendor that has decent barbecue, burritos, enchiladas, burgers...etc. There are also Chik-fil-a, and several other vendors inside the NRG Center.
We got carnival food because I got suckered into buying the Food Card at the pre-sale. The deal was $20 for $30 worth of food. But there are strings attached. You can only use it with the Carnival food vendors, not the vendors at the front row I was telling you about. And you cannot use the food card with a coupon from your Discount Pack. Frankly, that's a total scam because the coupon would've been valid had I paid cash, but now somehow it's not valid because I'm paying with a pre-paid food card.
You can actually bring your own food to the Rodeo. As you walk, there's no real limitation as to where you have to have their food versus your own. I've been told that you can sit at the wine bar during the day to enjoy your food, as they are not open until the evening. But, we found plenty of seating, that wasn't much of an issue.