You are on the right track wit what you have. My go to colors are black and chartreuse and blue and black. With the blue and black I go with a blue head with black body and blue tail. For the life of me I cannot remember the name of the creeks I am thinking of but it is just down from the state park and have standing timber. The timber is marked on any good map but in one of the creeks it is visible and in one it isn't and harder to find. Both are in the water depth you are hunting right now. You should try those as well because they will not be as far a run as up river