We killed a big bull elk on a sheep trip up North a few years back on August 27th. Got him gutless quartered and packed back to camp and hung up in game bags over night after opening the quarters to the bone along the muscle groups. Let him hang for a day, and checked on him and noticed that on a couple of the game bags flies were laying eggs through the mesh where it was stretched too tight. Pulled them down, deboned since he had been hanging long enough to let rigor relax, and we were light on pack horse power anyway and then put the meat in giant ziplocks, rolled them up after squeezing out the air and rolled them up in a tarp and sunk it all in the creek.
That meat was still cold after an 8 hour ride out in pack boxes against the side of a warm horse.