Not really part of a BOB, but for travel by car/truck in some parts of the great northern woods a chainsaw can be a useful tool just to get home. Trees fall and sometimes they fall across a road. Not that I've ever done it, but free firewood is always a good thing. Just my luck I drove down that road after the road clearing had progressed to the stacking wood phase. But for those who don't have a chainsaw, an axe or folding saw can still be very useful in clearing the path ahead.