Of course, every lake is different. The crappie are going to go to what I call the comfort zone to survive. If the water temp, oxygen level, cover and food source is deep that is where they will be. On a warm winter day when the sun heats the surface water, they might move up or they might just lay out there in the deep water napping so to speak waiting for a better day. Yesterday, my most productive depth were 18'-24' deep. The bite was very slow and lite, so we had to fish very slow and pay close attention to catch any. On the other hand, there were one or two rebels in the livewell that raced after the bait on the way down and made you think you had a monster slab. Water temp in the morning was 45 and by 3 in the afternoon it was 50. We are getting a rain right now and I hope it's a relatively warm one. Sorry to ramble. Yes, they will seek deeper haunts but don't just rely solely on that. Look for the comfort zone for that day.