If you are using minnows and have never caught a crappie. Well I would say there are probably not a lot of crappie if any in the lake. I would say try using minnows with corks try different depths with the corks in different depths of water mostly deeper water as the water is getting warmer and summer is coming. Crappie have big mouths so if you try artifical try 2" artificial baits because they will be too big for most bream. Now are you bank fishing or using a boat as this makes a big difference also. Crappie are farther from the bank and deeper this time of year also.