In the last eight weeks I have sampled somewhere between 200 to 225 RES from my 1/4 acre pond. The key to catching them has been "low and slow", basically dragging a light jig across the the bottom in a very slow pause and go retrieve. I have caught most of them in 2-3ft of water along the edge of the pond using a casting bubble/slip bobber as as strike indicator, I am confident that "low and slow" will work in deeper water as well.
Here is a "muddy water" RES from Sunday afternoon, we have had a lot of rain in the last two weeks and I currently have 3-4" of visibility.