When packing meat for a backpacking trip, it is important to keep the meat as cool as possible. The best way to do this is to put the meat in a cooler with ice packs. If you are unable to pack a cooler, you can wrap the meat in foil and then place it in a ziplock bag. It is also important to keep the meat away from other food items in your backpack, as the meat will release juices that can contaminate other food.