there are some HUGE flats up there and ya, definatly on a hot day get out and wade a bit. couple islands for lunch too.
and yep, knee deep is what a lot of it is outside the channels. the water gets real clear and that makes it so much easier. I usually start after memorial day as it takes a while for the fish to migrate up there after wintering below six span and spawning down stream. the upper river stays cool as the slower darker water heats up below six span, pushing them up there. that stretch stays loaded with fish till late august....by sept they start moving back down and its dead other than walleye.