Here’s a link to the refuge maps, refuge specific regulations can also be found on the website. Paper copies are usually available at federal boat ramps as well as a few other pamphlets. I’d recommend studying maps before going and scouting during the day before hunting. You’ll find out pretty quick that the maps don’t look the same on the ground due to the ever changing river system. I’d like to emphasize that the river is not a place to explore in the dark especially now that it’s getting cold and wear your life jacket.
Now that safety is covered get out there and have fun.
https://www.fws.gov/library/collections/upper-mississippi-river-pool-maps