Hello,
We've caught sea bass as a by catch while drifting for fluke in the above mentioned areas. You probably want to stick to structure so any of the several bridges in the bay would be a good spot. If you can manage to get the wind and tide to cooperate try just below the Margate toll bridge on the east side of the chanel and drift toward the bridge along the marina (You'll probably see guys fishing off the docks). It gets deep along the marina as you get close to the bridge. This is where we caught a couple of sea bass and fluke however they were shorts.
Good Luck,
Chris