Here's the skinny on my mistakes dont make the same ones. Was in CO for an DIY archery hunt and was lucky enough to shoot a cow on the last night. I didnt make the perfect shot a little back and a little low (56yds far for me and my set up) So i let it go till the am found her with in 150 yds. Quartered her on the spot and got her to the truck and headed for PA. So i stopped in the first town we came to (elk was in the cooler about 1hr) and bought some dry ice and threw them on top of the meat. Thinking the cold air would sink to the bottomand cool everything. Had the hind quarters on the bottom back straps then front shoulders ( order they came out). Then made it to council bluffs iowa the first day checked them and they were froze from the dry ice. made it to pa the next night opened the cooler and it stunk meat on top was still frozen from the ice. Well the meat on the bottom (hind quarters) I dont think ever cooled. they had a smell and were green between the muscles. I am eating it still and havent got sick. But it definatly has soured the taste. So be sure to layer your ice or something to cool all the meat. lesson learned will take 10 min next time to do things different. live and learn!