The fire was fueled independently with natural wood, we just toss the scraps into an open flame. We kept a large amount of the defenses after we disassembled them, just the little bits that had no future got tossed.
It goes without saying that you should never use treated wood in cooking and you should never use a significant amount of treated wood in any fire.
It should go without saying but burning a lot of pressure treated wood and/or doing it in an enclosed space is dangerous and potentially lethal. We joked about it enough this season that we let some token pieces of wood go into the fire but a vast majority of the wood remains unburned and behind the shelves in our shop waiting for the 2017 game.