You may be able to catch some fish earlier/sooner than you think!
I was out moving sheets of ice and flipping over rocks while hunting for crayfish yesterday (outside temperature hit about 60 degrees F). Most times when I flipped the larger rocks, I'd see a bunch of small fish darting out all over the place. Some swam off into the open, but several others would often swim toward shore and wedge themselves under some rocks. So I positioned the net in behind one of them, moved it's rock, then watched it swim into the net. I now have a 3-4" green sunfish in my 20 gal. long tank!
(which I'll probably replace with a black crappie once I'm able to catch one)
I was out in hip waders, and they kept my legs and feet plenty warm enough.
Upon catching the crays (I found lots of them) and the fish, I'd toss them into a 5 gal. bucket filled about 1/3 of the way with lake water.
Anyway, just thought you might find this interesting.
BV