My hardest was an elk hunt. I went for the day by myself and killed a nice bull at 2:00 in the afternoon 5 miles in from the trail head. I had the meat bags and sharp knives. I boned out the elk, grabbed what I could carry on my backpack. And left the rest cooling in dry bags in the creek. I walked out in the pitch dark with a headlamp on. I returned the next day to get the rest in 2 trips. The last two years, three of us carried out two elk in one day. The day of the kill was spent boning into the daylight of the next day. One hour of sleep, camp teardown, and a whole day of packing the 5 miles in and out. Tough work, but well worth the effort.