Norfork's not my home lake but have crappie-fished there a hundred times or so. If the weather's mild when you're there, there should be easy fishing at cover (lay-downs, etc.) close to the bank for spawning white crappie and smaller blacks. The biggest blacks might be done spawning by then, but it depends on the weather. If you have cold weather I'd vertical-fish any brush piles in about 15- to 25-foot water you can find about half-way up the coves (if the water level's not extremely high like it was last year.)