I'm going on a sheep hunt on the Salmon River in Idaho this fall and if I am lucky enough to kill a ram, I want to make sure I do everything I can to make sure the meat is protected. It is apt to be 80 to 90 degrees Fahrenheit and we may need 2 or 3 days to get the meat to the river and catch a boat going out. I have heard citric acid is a good preservative but cant seem to find it in the stores locally. I am packing 5 lbs of salt for the cape and horns if we kill a ram but want to make sure I don't let the meat be compromised. Anybody have any experience in conditions like this?