Ok, so you caught one out deep. That's a start.
Beat the banks and no avail? Ok, so sounds like the bass haven't committed to moving up yet. Have you noticed any beds?
When your out fishing, where are the majority of other boaters fishing? Are there very many points on this lake?
http://fishing-app.gpsnauticalcharts.com/i-boating-fishing-web-app/fishing-marine-charts-navigation.html?title=Lee+County+Public+Fishing+Lake+boating+app#14.6/32.5522/-85.3154/-15.4