the only other thing I can recommend is adding flash & vibration to your baits. I normally use 1.5" tube jigs for crappie, but when the water turns to coffee, i add a jig spinner (those ones that are like safety pins), or I go with tiny crankbaits with rattles. Those two changes generally keep me from getting skunked. Thinking about it, one other option would be to use live fathead minnows, they tend to act like a dinner bell too.