Actually in April and May fishing for smallies in the back bays of lake Erie. Regardless of what most people think they are vacuum cleaners, they will eat anything that is convenient as a food source.
Huge schools of them here, they will get into an area and muddy the water up rooting in the bottom like pigs. It can get the crawfish moving around in an area, which is why we hit those areas, it also attracts smallies. When you set the hook on a 25-60 pound carp though the "feel" is a bit different.
As long as the water is cool, 50-60 degrees, they are sort of sluggish, it is easy to follow them around in the boat with the electic motor and land them on fairly light tackle. Late May and June here they are starting the spawn and lauching themselves into the air, far more active, and they head for anything in the water once hooked. Using a medium action spinning rod and 8-10 pound test line just means they will break you off once they get to docks or wood.