New to detecting but been camping for years, recently took a trip to south jersey to a campground in Sea Isle city that has its own private lake and beach. tons of bottle caps and pull tabs but also tons of coins, all clad. While there was approached by a elderly couple and asked if i was the guy they called from Ring Finders. Apparently he lost his wedding ring in the lake. Shortly someone showed up with at CTX 3030 i believe, spoke with them, went out in the water and about 45 minutes later found the ring for them. Tried talking to him but he seemed all business, wasnt interested in chatting. Since i was there with the kids (6 and 7 year old) i wasnt really to focused on detecting at the moment.
But, to the point, campgrounds could turn up some good stuff. I only played on the beach on on my camping site, didnt venture around too much.