In the Feb, 2011 issue of Bass Player, the Rant Of The Month:
In the Jan, 2011 Tech Bench section they recommended keeping duct tape in your tour bag for taping down cables. Edwin Hurwitz wrote in saying that duct tape leaves residue, messes up floors, and ticks off venue personnel ( ... you will find yourself in an alley staring at a locked stage door ... ) and that gaff/gaffer's tape is much better.
Of course, BP's Bryan Beller admitted that Edwin is right (Must have been tired from all that driving.)
Rich