Fishing has been good lately. You should watch for water releases, they can make fishing difficult and paddling back up against the current impossible for any distance. There's a gauge at the FM2114 bridge, about 8 river miles below Whitney Dam. The web page for the dam hasn't been, in my experience, reliable - but the gauge is always right unless it is frozen solid. [log in for link]
It takes about 4 to 5 hours for the water to rise at the 2114 bridge after release at the dam. Best fishing level at the 2114 dam is 6 to 7 feet. I fly fish and don't do much specific bass fishing but once in a while I use live bluegills for bass bait. I see people catching bass with the usual bass lures so I'd say whatever works elsewhere is probably going to work on the Brazos.
Lately when the water comes up at the FM2114 bridge it has been starting to rise at about 5pm, which means a more or less noon start time at the dam. That can change at any time though.