No need to fillet the smaller ones. Scale 'em, cut the head off and slit the belly. Remove the entrals, wash 'em up, and theyre ready for the grease.Take a look on YouTube also to see some pretty descriptive examples of filleting crappie, both with a regular knife and an electric knife.
As long as there's no law about size limits on the fish youre catching....keep a mess or three until you get your fill on the crappie. Then maybe you'll become more selective on what you decide to keep.
Health nuts are going to feel stupid someday, lying in hospitals dying of nothing.