When I go crappie fishing I usually don't even bother with my live well. I typically bring them in, decided if they're a keeper or not (over 12" equals keeper for me), and then throw them into a cooler full of ice. You could go with this method, but there's rumor that they lose weight when you do that so a live well is preferred during derbies.
You can bring the fish up however you want, you just can't can't have any in your boat before you go out for the morning.