If the birds are not working I have pretty good luck trolling at the mouth of the nolan river and also trolling the river by Hamm creek.
My number one lure is a medium lip shad colored crank bait. Troll at 3-3.5 mph. a bait that gets about 8-10 foot depth. I usually troll the 16-20 foot range at the nolan. In the brazos it will run 12-25 foolish. You will catch a lot of nice sand bass in the river also.