I set out two saplings at the edge of my yard 20 years ago just for the worms. They are available from many nurseries,cheaply. Plant at least two. Some years my trees now 30+ feet tall yield two crops of worms per year. They will eat every leaf on the tree,then quickly they grow back and worms come again.I use a reach thru cricket cage to hold them for fishing. Mine tend to turn black like a banana does in the freezer. The cornmeal trick helps,also oatmeal. This year Im gonna try lemon juice and rubber bands to see how that is. Also when fishing,try pinching the head off,then start the hook in the other end and turn'im inside out! When you grab them they want to put some saliva on you that will stain,so I use surgical gloves when collecting my bait.Happy fishing!