I rig them with on a 5/0 Gamagatsu (spelling?) worm hook. I use weight sometimes through the center of the body. I haven't tried Carolina rigging them, but I have been meaning to.
I use a small jighead - 1/4 to 3/8 oz - and hook through the sluggo "head" then slide the plastic on so the hook comes out and rides underneath about an inch back...the sluggo streams behind like a seaworm...