Hey Tryhull:
If anything the crappie in our deep reservoirs move back out of the creek arms closer to the main channel and deeper water in the winter, compared to where they are in the fall. We fish for them about the same depth in the winter - after the Fall Feeding Frenzy is over - as we do in the hot summer time after the post spawn is over. Even if they aren't all that deep they seem to like to be close to deep water in the winter and summer here.