Re: walleye and or white bass flies
Most emerger patterns definitley are hatching mayflies. Soft hackles could work well in this case too. When trying to make your fly imitate an emerger in a still water, how you fish it can be very important. Emergers are generally taken by fish either while near the surface or as they make their way up to it. To imitate one that is moving up to the surface, after your cast let the fly sink for 15-30 seconds. Then start to retrieve it slowly, making the fly look like a bug that is swimming up to the surface.
White bass are typically caught down here on minnow patterns as well, like mike said. Clousers are very effective, as are some smaller streamers. I would just make sure the fly is mostly white, and has some weight up near the front to give it good action in the water.