We fished Friday at a lake near the Nancy lake system. Ice was thin, but solid. I would guess 3-5 inches. However, it was NOISY! We kept hearing lazer noises very similar to the guns off star wars. As well as tons of cracking and pops and booms. Visible cracking all over when we chipped out holes out. Very unnerving, but we were cautious and made sure we had 4 inches before getting to cocky out there. Later on, a guy actually drove past us on his 4-wheeler...yes on the ice. I thought that was a bit stupid..by whatever.
We caught over 20 fish. Trout and char. none over 18, but a couple came close. Great day.