We used https://www.reloutdoors.com/ last year. They were brand new ice castles – everything was clean, they had a Biff setup closeby. I was out there with my 6yr old son and 2 year old daughter, we caught some crappies, nothing huge, but enough fish to keep the kids entertained for a bit. We only did an overnight (were trying to gauge how my daughter would do). We were in a 16ft, I think I would try and book the 17ft next time, so we could have had the microwave (for like popcorn for the kids) and a bit more space.
One thing I didn’t think about, was water for “other things” We brought water to drink, but then used dishes for breakfast in the morning and had to use drinking water to wash those. If we had stayed longer, I would have had to run in to get some more jugs of water.
I was pleased with it though, everything was ready to go, clean and warm when we got there. If I was by myself, I probably would have tried to check out some other areas to fish as well, but if just trying to do a sleeper on Minnetonka I would recommend it