aside from first ice, this is the BEST time to ice fish, in my opinion!
yes, t-shirts all day long (long sleeved) 
lots of open holes in areas that have been fished, and at least if you have to drill, the holes stay open!
fished perch yesterday on cutfoot after a crappie outing with less than desirable results, found them to be quite aggressive in 11 feet of water, that is until the walleyes moved in…but that was fun too!
good reports on bowens flats, first hand.
and I talked to the people at Gosh dam place, they said they had a group that stayed at their hotel over the weekend who went home with 240 perch!
that sounds like a good bite to me. 