GEAR TIP: HOW TO CARRY A SMALL AMOUNT OF DUCT TAPE
Take an old credit card, food shoppers card, library card etc., wrap the duct tape around it and you are done!
Now you have a lightweight & compact way of carrying duct tape for when you really need it!
I actually prefer “Gorilla” tape over duct tape but duct tape is fine.
Gaffer Tape is great also, but very expensive. http://en.wikipedia.org/wiki/Gaffer_tape
Also, wrapping the tape around a cotter pin is another option.