I fish still water lakes just as soon as the ice is off. I catch a wide variety of fish Bass, Wipers, Walleye, ect. Even Bluegill!
I use mostly floating line with heavy flies to get down where the fish are. I'm good for about four cast untill theres so much ice on my guides and my fingers freeze I'll have to stop for a while.
Anyway the cold is gone now in Eastern Nebraska. Now It's The Dog gone wind I'm fighting!