I would harvest the crawlers, lay newspaper out and dump the container of worms onto the paper, then lay more paper on top of them...I might do this several times, changing the papers frequently and removing a lot of the slime from the worms...then, I would place 2-3 inches of water in the bottom of a styrofoam cooler adding one or two trays of ice cubes and throw the crawlers into the icy water overnight...in the morning, the crawlers will be approximately twice as big and, if you use em that day they'll wiggle like crazy when they hit the warmer water of the the lake or river you're fishing...had my best luck fishing em on Lindy slip rigs and just hooking them near the head with a small aberdeen hook...