Went to school in Platteville, we always fished the Mississippi backwaters from Platteville. Pretty much the only ice you'll find. We did our best on Bertom Lake. We did decent on Sunfish lake by the pool in DBQ and did alright out by Potosi point when it was cold. Bertom had some thick back crappies, I miss it out there. Be careful moving around the marsh to get in there it's a bit risky, makes you learn how to read ice real fast! Spud bar is a must in the marshes. PM me if you try it out and need specific spots, I still have a bunch on my GPS, I think they will probably still produce fish. In DBQ did alright on mud lake.
I know these are all river spots but unfortunately that's about all there is out that way, that's why it's the driftless all coulee streams no lakes really.
You can go up the river and do better, Ferryville area is productive with the right ice.
