I've been catching several bass in Wittenberg arm at Lopez. I caught a few within a few yards of the shore on a 3/8oz white StrikeKing spinnerbait. To get there, go through the gate and keep driving until you get to the end (about 1-1/2 mile). You'll see a parking area that says "equestrian parking" park there and work that rocky shoreline with a spinnerbait. There's some submerged brush off the shore so try to avoid letting your lure sink to much into it to avoid getting hung up. The senko bite has been kind of off for me lately, but i've done good from the shore there with senkos in the past, so you might want to try those also. Good Luck!
-Phil