Some great finds, congrats! The beaches and water I have access to has so much competition it's rare to find anything good. To minimize the competition I take to the water more often as it rarely gets hit. But last week as I was about to go out I got news from one of the other detectorists there that a guy from across the state, 4 hours away, had just been there 2 days before and swept the place clean. Not even a pull tab left!
Moral is that if you got a good place and are making those kinds of finds, stick with it!