Weapons basically, are not allowed. If they find your bat, cut down, and under the front seat, it's a weapon. Expect to loose it. In a storage compartment, it's sporting goods. Hunting knife in the door pocket, same thing. Put it in a compartment, or kitchen drawer. Utility knife, see above.
Food. Keep all frozen food in the original package. It's never fresh, once it's been frozen. Leftovers, try to minimize them. Spices? Don't worry about them. Unless you keep your "Oregano" in a baggie, as you head south. We're cool with it up here. Olive oil, not an issue.