All our elk get quartered in the hide and hung in trees with usually two quarters facing each other, hide out. We then cover the quarters with tree bows fully to keep the birds away. We rifle hunt in late October so the temperature is not an issue. If there is bear sign in the area we will pack the next day, if not, it is usually two days before we pack. In the 40+ elk we have hung in the woods over the years in my camp, we have only had two incidents. One was a sow and two cubs that got into one of the quarters and the other was a cat that tore a quarter down and drug it a few feet away. Neither case resulted is much loss at all. My father always believed that the bears would eat the gut pile first and it would take them a day to do that.
That being said, if I ever get the chance to harvest a bull in September, I'm sure my methods would change.