I’ll assume that you are rom the Cities with your reference to the metro fishing in open water? If you want to stay on the Minnesota side of things, there’s some backwaters upstream from the Red Wing dam I believe…Black Bird Slough possibly? Your best backwaters will be found from Wabasha to Winona but even down as far as La Crosse will offer some great fishing.
Some of the marinas along the way will offer up some northern fishing along with panfish. Baypoint harbor in Red Wing will offer panfish and crappies in and around the docks while the more open bay area there will give up an occasional pike and even a stray walleye. Wabasha Marina has a great early crappie, panfish and northern bite as soon as four or five inches of ice can be found. This marina will also have some serious perch in the mix too. Across the high bridge towards Wisconsin from Wabasha there are several areas to stop and fish on the right hand side of the road. There’s a lot of current on the left side so best avoid ice there. If you feel venturesome you can run down to Alma, drive straight thru town and go about a mile or so where you’ll see cars pulled over and parked. You’ll see the people on the ice on the other side of the railroad tracks and will be legal with your Minnesota license there. The name of the area is Moseman. Back on the MN side below Wabasha there is extensive backwaters to be found and fish will be everywhere really.
For help with locations below Wabasha and into the Kellogg area print of a Google map of the area. The dike to the Alma dam beginning near Pioneer Campground has a series of pools called the Finger Lakes, all of which will hold nice crappies and sunfish, maybe a northern at times. Be careful of the ice on the pool with the incoming culvert as the current there can make is iffy in some spots. Further down the coast from there is West Newton. Sunfish, crappies, bass, northern, even walleyes are on the slate there with the most emphasis on the pannies….but you just never know what will show up in this place.
A person could go on and on with spots to fish but I can’t hardly imagine getting much further than Wabasha and being in fish of some sort. Honestly the best tool you can have to get started down there is a good map of the area. Simple tackle, waxies and/or minnows and just have a ball. Good luck! Fun area. Lots of eagles.