This video explains how to use your metal detector in a campground. In this video I am using my Garrett Ace 250 metal detector, however I don't think that it would matter which metal detector you were using, the basic principles are the same.
I use to do a lot of metal detecting, and campgrounds have always been one of my favourite places to detect, however I developed a really serious dose of tennis elbow and had to stop a couple of years ago.
I sold my Garrett AT pro to Pratty, one of my best mates but held onto the smaller Garrett Ace 250 as it is an awesome, and very underrated little metal detector, or coin detector.
I hope you find this video useful and helpful. Good luck on all your metal detecting adventures. :)