They spawn early - they are close relatives of walleye and sauger. Small baits, especially small minnows, fished slowly just off of the bottom. I've caught them the best in the Hiwassee just upstream from Hiwassee Island, and in the Tennessee river upstream from Hiwassee Island. If I remember correctly, it was generally 8 to 10 feet of water. 6" fish are common, 8+ a good fish, ant there are always some bigger. My personal best weighed exactly 1 pound and was HUGE for a yellow perch around here. Good luck!