I grew up fishing the Susquehanna river for smallies, and here's what we used to do (I admit, I don't fish tubes often now). Take a texas rig weight/worm weight, insert into the tube, pushing up to the head. Take a small piece of old rubber worm, insert that into the tube behind the weight. Now tex rig with an offset or other hook of choice, making sure the point goes into (or through if you're texposing) the tube just behind or through the piece of old worm. Works great, and incredibly snag-proof.