I thought of this question as a way to represent long term survival where you have minimal tools yet you still aren't starving to death, as I believe this is the hope of the contestants even though it doesn't play out like that. For myself, I'd personally bring my 2.5# Collins Homestead Cruiser 28". Why I would bring such and axe over a boy's axe is due to the fact in my mind is that while having a metal hammer is better for powerful blows, I could make an array of batons. Plus I have the two different grinds. Granted it isn't the best splitter ever as the bits are thin, I could open a crack with the axe and hammer in wedges with the baton for firewood. Beyond this any axe with a head weight above 3# in my mind would be ridiculous as at that point your waisting to much energy. Finally if a Cruiser worked for Dick Proenneke It would work for me.