Right now the Madison chain is loaded with white bass.  All four lakes have white bass but Mendota has real large numbers of them, and some big ones too!  In Southeast Wisconsin I know the Fox River has white bass.  Just about anywhere on the Wisconsin River system will have white bass.  A few lakes here and there have them I know. A smaller lake half hour north of Madison (Crystal Lake) has yellow and white bass.  Rock River including downriver and up river from Lake Koshkonong has real good numbers of white bass.  Also, when I was a kid I used to catch some HUGE white bass below the DePere dam this time of year.  Not as many in the Bay as there are the Winnebago system, but they're big!

I used to catch tons of White Bass in the St. Croix River. Around here everyone called them  “Silver Bass.”  Jut a regional thing I suppose. If I remember right it was always toward the end of summer when they had their big runs and you could catch one on every cast. A yellow twister tail was killer.

Was fishing the Wisconsin river in Nekoosa by the dam and had a good time.

Wasn't looking to fish Whitebass but it was almost every cast on a blade bait.