I was just in the Hills area Feb 17-20th. Ice was great. Fished Lakota, Sheridan, and Stockade. Sheridan was the best, and the perch there aren't wormy like stockade. Caught a nice pile of large gills in stockade though, along with a nice northern
18 inches of ice pretty much in the whole area. There were ATVs and cars on some of the lakes. Edges were pulling back a little but I think you'll be okay for fishing in that area for at least a week or two.