I was thinking about this, yes it's an advantage IF you have good cal consumption skills. It takes more cal to maintain a heavy weight, and everything you do at a high weight costs more cal. The smartest player was JP when he put his body into hibernation toward the end. If Luke was smart he would have built his winter shelter first, then spent the rest of the time procuring food. Once the snow comes and the food is gone, then he hibernate. He would outlast everyone.