It can be just about anytime of day and typically comes in a flurry. I only troll LOZ and have had very good luck during the spawn, post spawn, summer. During the spawn you can load up on females still holding in deep water in spawning coves. Post spawn you can catch them in the same place as they start to move out. Once the heat sets in and the water gets over 80 degrees I have more luck on the main channel section of the lake, or main channel of the major creek arms.
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"In my father's house are many mansions..." John 14:2