You might look into fishing the Guadelupe river right below Canyon Lake.
It's around 30 miles north of SA and there are several river crossings and camps along river road, and rainbow trout stockings are taking place this time of year.
Ultra light spinning tackle and small spinners or jigs, and if your into fly fishing that can be the ultimate way to go.
You would probably have better luck than at Calaveras or Braunig at this time of year.