This is something I've always half wanted to do. I did buy a warm farm container once but all I did was kill worms in it so my attempt didn't last long. I have made a grass pile out back, which should produce and I need to check it. I don't fish all that much but when I do, worms are my primary with lures being secondary when the worms don't work. I never heard of this 'grunt' method but at night, they can be picked up off the ground in areas where they live. There is a knack to getting them. I have a camp in Upstate, NY and a hardware store that consistently has nice, large crawlers but they are getting expensive.