First off, let's talk about the basics: bag size. You're allowed to bring a bag, but it's gotta be smaller than 12x12x6 inches - yep, that's smaller than a medium-sized pizza box. Don't even think about trying to sneak in a giant duffel bag, or you'll be roped into a world of trouble.
Now, we know what you're thinking: "What about my essential items?" Fear not, friends, because you're still allowed to bring in wallets, phones, and keys. Just don't try to smuggle in any contraband, like outside food or drinks - the Rodeo Cookoff has got its own delicious grub to offer.