Actually, Charley, as you may be in a position to know, I misspent significant portions of my college years at the Sleeping Bear Sand Dunes Park on Lake Michigan, and EJ, we watched the submarine races at night in the Red Cedar River (or else we went down there to get fresh mud for our turtles), rather than drive all the way to Lake Michigan, tho the sand is softer, as I recall...
Mick is right, Charley, that was REALLY BAD...
Blessings,
Barbara