Thanks all. The fish all had bellies full of bait fish that look suspiciously like rainbow smelt, and possibly caddis fly nymphs(which make casings with twigs, leaves, and other organic materials, and I often find such materials in trout bellies).
I would believe Oliver would be sketchy. It has been open and iced alternately all season. Was the ice on the channel okay? I have actually done quite well fishing just in the channel when other options weren't available.
Bows through the ice are a great thrill (and delicious). Especially when the ice is clear and you can see them fighting right below your feet! You definitely have to work to get them landed, the most important thing I have learned is that as soon as their heads are in the hole GET THEM OUT!
Hoping to get one more chance on Olin this weekend...