Overuse of the wood supply could be an issue with a real campfire but not so much with a BushBuddy or KellyKettle. My "Buddy" burns about a cup full of wood chips per fuel load ( about 8-10min ). The amount of wood I might use during a week trip will be less than normal small campfire.
Sparks from a fire could be a concern but so far with my stove I haven't had any, I wonder if this is a benefit of a downdraft design?