My last day was April 13 as well. We went to Fourth Lake, had a good 12 inches of solid clear ice with 3 inches of rotten ice on top and 2-3 inches of wet slush on top of that.
4 of us caught 20+ perch but had no other species biting. There was much more water around the edges when we left than there was when we got there.
Cleaning and putting away the ice gear this week.