Honestly, though, i would recommend avoiding the shallow area, and fishing around the south end of the lake (using the top of the picture as the arbitrary north). It goes from really deep to really shallow pretty quick, and big channels will like that. I wouldn't fish too shallow, otherwise you'll get alot of the little ones. The bigger channels I'd would say would probably be about 10' deep, cruisin the ledge dropoff. Of course, again, this is night fishing, which is when I do most of my fishing, because the cats are most active then. But during the day, do the same thing. Don't be afraid to fish deep water, but if you're targeting channels, don't go much deeper than 15 feet. Maybe even cap it at 10', especially if it's a smaller lake.
And for targeting large channels, DON"T use stinkbait. You'll get alot more of the smaller ones that way. Use live 2" perch or blugill, or fresh cutbait. The older a fish gets, the more fish is in it's diet. And research shows, that the more fish is in a fish's diet, the bigger the fish gets. So older, bigger channels generally eat alot more fish than other foods.
Hope this helps.