I have done both methods and have to say the easiest and quickest is the weed burner. It also does a much better job. The bonfire that many do does not do a good job of burning the liner off the bottom or below the intake holes. The weed burner will make quick work of these problem areas. Also, the weed burner is the best way I have found to light the coals in the charcoal basket.
Fired Up Smokers KCBS Team, Smokey W's Pit Que NCPC Team / 2011 NCPC Whole Hog State Champion