I would bet that the few crappies are actually really nice sized individuals. What do you say gopack?
Sounds like your fishery is actually in pretty decent shape for a pond for your kids to grow up fishing and pondmeistering! You could plop a handful of channel catfish in every year, lets say 50 or so, to put some more meat on the table if that is something you would be interested in, otherwise just eating a handful of 11 inch bass sounds like the meal ticket!