I would recommend Navionic’s Upper US Rivers and Waterway’s chip. While some of the other lake chips give you some degree of detail for select pools on the Mississippi, this chip gives you very good detail on wingdam locations.

Went out for a few hours last night, the rain was pretty constant but at least there wasn’t ice coming over the rollers. We boated about 20 fish in 4 hours, most were 12-14″ walleyes and sauger but we did manage an 18″+ sauger, a 17″ and 16″ walleye (we kept a 14″ sauger just to get a meals worth). There is a pretty stong back current along the short wall, but most of the fish we caught were towards the end of the short wall in 12-15 FOW where the slower water was. The fish seemed to like plastics on the move more than vertical jigging.

I was up there Monday and we got into some nice ones on the Wisconsin shoreline just north of Deer Point. Just look for the seagulls, they seem to follow the schools of white bass so they can try to snatch the shad as they jump from the water as they flee from the white bass. Good luck!