The AC have changed the crappie fishing in both lakes, but far from being decimated. The sport fish are in different places and react to different approaches.
I suggest you find a guide who specializes in the way you fish (trolling, spider rigging, long lining, etc.) and book a trip to see how and where the fish are and how the guide goes about finding and catching them. Some of the guides shut or slow down during the winter months, but there are some that are still active. If you want to book a spring trip I strongly suggest you do so now or very quickly. The hot spring months fill up quickly and I am sure most crappie guides are filling up their schedules already.