Gull Lake, MN. The most diverse ice fishing you'll ever find in the Cass/Brainerd/Baxter area - bass, walleye, pike. Had a movable cabin, drilled our own hole (of course), complete with burn barrel, and plenty of sandwiches.
We had family that lived in Savage, MN, and Eau Claire, WI - so, everyone did a lot of driving to get there. Of course, us 'coasties' flew to Minneapolis/St. Paul.
This was back in the '70s. Colder than my ex-wife's heart... your hands and feet would ache, just like back home in the Northeast, but if the wind was up, you needed to be careful. I remember the warmest day we spent there was 8° F, in early February.
We did some open ice fishing in 'Cow Hampshire', but, there wasn't as much variety, and you still froze y' @$$ off. LW