We were just at Hampton Beach a couple of days ago. There were 5 other people detecting the beach by the strip. I found mostly change, and a nice lighter.
This pic is from Hampton Beach state park which is down further, we didn't see anyone detecting there.
Hampton beach has metered parking so most of our change wound up back in the meter. If you are going to stay all day their are parking lots for 5 dollars a day. That
s much better than running to the meters all day. We had a great time there and if you like fish and chips eat at a little seafood restaraunt next to the Beach View Inn.
PS the water was like ice cubes. Not many people were swimming