I think the ability to make wooden carts with handles so you can haul more wood back from long distance to your tribe / home fort what ever it mabe. Of course you would have to chop it down before hauling it the more you have on the cart the more endurance it takes to wheel it and more you have to stop rest of course. Also if able to tame animals mabe like buck or a bear if tamed can hook the cart up to the tamed animal and you guide them back hauling the cart behind them would be a nice touch.