Smith lake by Near Duncan Bridge....

Hello all,
I am looking for some information on Smith Lake in central Alabama. my wife's parents live just down from Duncan bridge on that lake and I am having a super hard time figuring that lake out just because it is sooo very deep an with basically submerged rock cliffs. I think off their dock they are sitting in about 130 ft of water. I ve tried just about everything from jigs, to crankbaits, spinners. to jigging a night crawler and its hard to even catch bluegill which should be bread and butter! any help PLEASE would be awesome!!!

Thanks In advance!!

Ted