There is some pretty good smallie and catfishing (both channels and flatheads)The lower Chippewa is a great river to float, as it has a ton of sandbars and shallow flats. The above mentioned flats and sanbars keep the boats to a minimum, but you can run into some jet skiers, and the occasionl fan boat.
I have never floated it, but even with my jon boat the trip takes a while.
Good luck.