Boy have you hit the nail on the head. They are the best bait I have ever seen. Actually many many years ago when I lived in southern IL there was a hatch one year and if you wanted to catch fish that is what you used. The fish didn't want any thing else. Seems like the bass and catfish really inhaled them. But we caught everything on them. Even the bluegill somehow managed to choke them down. The lake we were fishing was right in the middle of a forest and you almost had to wear earplugs to fish but getting bait was easy. Just bend over and pick them up when you needed one.
Crappie spawning and morels popping up at the same time. What was God thinking when he made that schedule. It's pure torture every spring deciding which to do.