Well, first , not all the crappie are going to deep water! Some will go up the creeks and rivers when the water hits 55 degrees . In my opinion it's a lot easier to catch the big fish right on the banks of the rivers and creeks when it gets cold , really cold is the best time , the water will clear up faster the colder it is and look for the slabs under fallen timber laying out in the creeks and rivers. A lot of the time the fish will be their because that is where the shad will be, some times they will be vary shallow , in four feet or less right on the banks. When the wind is blowing hard I had rather be in the creeks than the big blue! Hope it helps!