Me and my partner have been doing almost the same thing you talked about and it is on a big cove also. We could see the bass making nest but they wouldnt hit so we just left them that morning and went and worked some points and such. Came back just after noon and they werent there. So we backed off into deeper water, and started throwing a crankbait, rattle trap, and a soft plastic jerkbait. With that we put 11 nice ones in the boat including one that was around 7-8lb. So my sugestion to you is to wait till the sun gets high in the sky and back off into deeper water on points and drop offs and try those lures.