I hunted last week and hauled a bunch of meat out, My leg muscles were pretty tired. I went for a bike ride the next night and could feel many of the same muscles burning. Pick up the pace on the bike and you will be working not only the muscles. But will also be working on your cardio and pumonary systems. From your posts it seems like you will be up pretty high on your hunt, so expanding your lungs also might come in handy.