Those Savannah Sound bones are sure hot and cold.
Next time when they're tailing heavily in shallow water, lengthen your leader (16ft) time it right and drop a small crab fly right on top of them when they're splashing like mad. Their own noise helps to cover up the flys entry into the water. Let it sink and wait. When the tailing stops, just slowly drag the fly along the bottom...no strips!. Any weight, do a solid but short strip strike.