Beautiful Shrecky,
Swam in those waters many times and often thought about detecting those shores, that sand is very course and lots of fine gravel, didn't know they shipped in sand, I haven't been there since the late 60's & 70's, now some war of 1812 relics might wash up maybe a button or two that should be the next find. Maybe Admiral Perry's cutlass or a buckle.
Good luck to ya and 6:00am, next time heh heh
Rebel Man