I am not sure what the river has to be at georgetown in order for the bean field to be flooded. I have fished it in the past and caught a lot of white bass like you said. I would almost bet white river has to be around 21 ft on the gtown gauge to be backed up that far. You might call the AGFC folks at the Steve Wilson WMA and ask them. They have to go that route to get to their office. If you are in the area, the catfish Miss Joann cooks up is hard to beat.
Ringo