For what its worth some friends and I went pleasure boating for a day a few weeks back and went swimming in a cove between oakland and pontiac just south of the state line. I grabbed some goggles and went free diving to about 15 feet or so. EVERY ROCK I FLIPPED OVER IN THE AREA WE WERE IN HAD ZEBRA MUSSELS ATTACHED. You couldn't hardly see them from above, but as soon as you flipped them over you'd see them on the underside. We were right near what I think they call the saddle, that long submerged island/point near oakland.
Glad to see this post. I feel like i devote almost 75% of my time on the lake graphing and fishing submerged brushpiles and have had very very limited success the last month fishing everything from jigs to worms to dropshots. I guess I'll keep grinding it out. I'm curious, did the brush happen to be on any certain type of bank or point? or was it pretty much, if you find the brush there were bass around? Thanks for the post!