The white bass in the river for me has always been hit or miss. Last year I did well and other's did not do so well. For me the only way I have any luck is when it starts getting warm and the river is not muddy from the spring rains is just go and see if you can find them. Once you locate them they will be there for days. I always put in at Bryants and run up the river and start fishing for them at the waterfall's, and work my way up to the bottoms. Rooster Tail's, Sassy Shad, Pop Eyes, shallow running crank baits, ect. always did it for me. But one thing I did learn is once I found them, run the boat up on the bank and start fishhing from the bank, I would catch the bigger fish doing this.
Hope this helps
Billy