It’s been a long time now (14 years), but I use to live in North Mankato. I thought the fishing was fantastic in that area. Many lakes to choose from. Some of my favorite open water lakes were Madison, Elysian, Francis, Washington, and one of the Jefferson’s (can’t remember which Jeff I liked best). Didn’t have as much time to fish in the winter, but I did get out chasing panfish once & a while. Madison had some nice crappies it, Washington we fished bluegills & crappies, and even hit George once & a while through the ice. It’s been a long time, but that is what I recall. You could check the Bobber Shop in Mankato for info or the bait shop in Madison Lake (not sure if it still exists), they were always good sources of info for me many moons ago when I fished the area.