Find the baitfish schools, Crappie will be there or very close by.
When the Crappie aren't feeding, and the water is 40 and below sometimes they will lay flat on the bottom. I've caught Crappie in those conditions with mud on their fins and belly. I'm not a deep-water guy and typically catch my fish in 10 feet of water or less year-round. Finding the baitfish is always the key. Next is depth of fish since Crappie will come up to hit a bait, but don't look down. Then bait color and size and finally the action of the bait.
Especially in winter the baitfish school you see may be small gills or stripe instead of shad. If you don't catch any Crappie on the first school you find then keep moving. The perfect setup is a bait school with large fish just below the school. In my experience these are usually Crappie following the shad and picking of weaker members of the group.
I think when you find Crappie on vertical structure, they are waiting for baitfish to move by to rush out and get a quick meal. This is the reason when fishing laydowns I keep moving looking to just catch the one or two active school on each piece of structure. I find I catch more by continuing to move rather than anchoring or tying up and sitting in one place.
