Whats the forage base? Natural lake of a reservoir? If perch are food then try deep, minnows then shallower. I think 20' is deep. I would try 5' to 10' and I would also think about try big bait, 6" being on the small size. I would also try some big swim baits and rip em and see if anything come on the graph. The other thing I would do is fish at night. Big fish like the dark in clearer water and they will be up in 3 to 4' if there are minnows up there. The other thing with big fish is time on the water. Drill a million holes so you know what there, rocks, sand mud, weeds and set accordingly.
My game plan most days is to try something new unless I know where to fish. I try to drill 100 holes a day on structures. Then I try to fish and graph all of them, Most of time I fish with a couple people to cover more water. Sometime 10' is all it take to catch fish, soaking minnows will not cover that much water.
