Millwood Lake in Howard County where I live, it is pretty easy to catch your limit of 20 crappie per person. That is why I keep my crappie in a basket to keep them alive. If I do catch some smaller than I want, I just replace them when I catch a bigger one.
I have caught some small ones, but I do not know this to be true or not, but I switched the size of minnows I use also and I seem to catch bigger sized crappie using the big minnows. This is not a fish tale maybe all of the crappie were just big where I fished that day, but some say the size of the bait can affect the outcome.

Anyway a limit of 20 is plenty for me and my son does manage to catch a few. My wife is a sticker wanting the fish rotated every year in the freezer, so we just keep enough for our family reunion and maybe a couple of cookouts and than restock the freezer with fresh fish each year.

Of course I fish for catfish also and I love to bream fish along with crappie. I mostly keep catfish for cookouts and the crappie for my immediate family and a very few members from time to time. I share if I have plenty to share.