From a nevada hunt in October last season.
I'm not sure about your region but I would practice in the terrain you plan to hunt in and have about the amount of weight as you plan to packout when you take the sheep... Our area was loose shale and I'm 26. I was about ready to die packing out 80lbs of meat with my 40 year old counterpart. Average hiking per day was around 10-15 miles mostly vertical climb on poor footing.