As others have said we would leave our campsite for hours at a time. We usually took phones, etc. with us and locked the door and never had a problem. Call me naive, but I choose to believe that most folks who camp are good people. Most would keep an eye out for something out of the ordinary. Our experience is that even the party types that everyone complains about (especially on holidays) aren't trouble makers. They seem content to drink, argue and listen to the radio too loud.