On the oxbow I live on, Crappie move in shallow in the winter. I haven’t ran across any lately, but I haven’t really been fishing for them yet.
Balanced jigs are my go to Crappie getters. They seem to work better than woolly buggers. I use Arizona Simi seal for the dubbing and marabou for the tail , colors vary. 90 degree jig hooks, sizes vary and bankers pins for the balanced extension part.
I don’t like fishing them under a cork, so I just slow roll them through the zone. I prefer fly rods and reels over spinning tackle for Crappie when they get shallow. Panfish jigs work here on the lake and in other water like the San Saba River and are simple to toss with a fly rod.
I don’t really like fishing deep so I don’t go for Crappie when they are down deep. I catch and release the ones I get. I like saltwater fish more for the table.