Sorry friend. Not much in the way of White bass here abouts. I have to go to Three Rivers or Canyon lake to find. Three Rivers is a 2-3 hour drive, and Canyon lake hasn't started yet. Other than that, hope you enjoy your stay.
Theres Flat Rock park in Kerrville, Guadalupe river across from the VA hospital. You might try Joshua springs park in Kendall county. Its just a few miles down I10 towards San Antonio. Hope this helps.