It sounds like your near to one of the best bass fishing lakes around y0ou just need to simplify tackle and go back to basic bass takle that seems to work anywhere there are bass.
First 6 inch purple plastic worm curly tail or not texas rigged
Second some name brand spinnerbait (strike king or stanley will do)
Third a good jig type bait (Jig n pig, 4in grub, or a gitzit ) Crawdad colors
Fish around and kind of structure ( Docks , rocks , or just some grass or weedbeds)
patients when you think your fishing slow enough slow down even more...
Hope that helps