Do not count on other people to bring your food. Occasionally, we throw an extra pack of hot dogs in the cooler because we know Brad will show up short, but unless you're Brad, you shouldn't count on it. Pack everything you own. Take anything that you ever used on any previous campout. If you leave an item behind, you will, without fail, need that item.
Any damage incurred during a campout is just too bad.
This rule was brought to my attention by Jay and Brad. Jay had a Mini-Weber Kettle that Brad dropped a log on. It was flattened. Several folding chairs and camp coolers have also met the same fate. Now that's a burn . . .