if the water temp is 52 off of that deep water, then try hitting the shallows. There are going to be alot of early spawning crappie this year and they are going to start their nests very soon. Try some shallow water coves as well, the temps there could be around 54. If that's the case, I promise that if you work the brush in about 3-5' of water, you will come across a slab or three moving in for the spawn.