Reservoir's are fickle.They are the nation's finest fisheries.But they can be hard sometimes. Pick a few smaller natural lakes or non flood control impoundments that you can dissect the water and target fish easier. When the bite or the water is messed up on the big flood control lakes.....hit those other bodies. If they have good fishery surveys on the species you are after in the size you want....learn that lake inside and out and get after em.