I have fished AJ, Boltz, Bullock Pen for crappie last year on a few different occasions. I really wanted to test those waters to see if they were worth it. I have heard they can be good for other species like catfish and bass but the size of the average size of the crappie are pretty small. That's what I've found. They are plentiful in lakes like Boltz. And there's no size limit so if you want to pull out 30 8" crappie and spend the time to clean them, that's your lake. If you're looking for size, I would head to the OH. River creeks. I have fished a few of them and they all have some nice crappie in them. They have smaller crappie too of course but if you want the chance to catch 13" + crappie, I think the river and it's creeks are your best chance. Again, that's just what I've experienced. I would love to find out there's a N.KY lake with nice crappie in it. Until then, I'll stick to the OH River tributaries and East Fork Lake in Batavia, OH as a backup.