There are a fair amount of mountain streams around in the area we plan on hunting(water temp is cold, under 50deg that time of year)! I also have large, heavy grade plactic bags that arent heavy or intrusive when folded! Our plan is that if we harvest an animal we immediately quarter/cover with game bags/and hang off ground with parachute cord overnight to cool! Then make a trip back to camp that night and get pack frames and plactic bags, and return to kill early morning to debone! We will leapfrog the meat out a mile or so at a time and place game bagged meat in a plastic bag and place in stream! The water should cool it well, i have a group of friends that do the same thing every year and they say it works well! Usually lose 2-3 hunting days getting meat out to refrigeration and then getting back in to hunting area! I must say that they only hunt over the counter areas in CO every year and their success rate is way higher than the 10%-15% figure you read about, more like 70%-80%, not bad for a couple Minnesota boys eh!!!