Saw this post on another site sounds like levels were low but still fishable:

Csfl event on st clair cancelled?
Due to low water levels the event was cancelled. Had a chance to make it out friday, to only find the marina to have very little water. Lowest I have ever seen. Fishing was extremly tough, for smallies anyway. Had one smallie for 5 pounds, everything was dirty. I mean everything. Spent the afternoon largemouth fishing. Wow i think the tournament if it would have ran could have easily been won on largies. So needless to say the lake st clair fall smallmouth awww was a little over rated this year. endless it cleans up.

hopefully it cleans up a little bit cause this lake can be off the hook for deep smallies in novemeber. Blade baits and jigging spoons