Lots of times, when lakes rise quickly, the lake managers start releasing water quickly. Crappies don't like to spawn in those conditions because if the lake continues to fall, the eggs may be stranded. After a day or two of stable lake levels, they will be right back on the banks. Those males are ready to go, so the females will be as well. The key during the spawn is to have a hook in the water as often as you can, because the females race in to the bank, lay some eggs, and race right back out to deeper water. They move from one male to the next laying some eggs with each one. Try throwing a jig/bobber combo out over some of those sunken trees. Have the jig about 3' below the bobber....but experiment with depth up and down. Very slow retrieves. Stick with it.