In some extreme cases where we were not going to be able to get meat back in a timely manor, for instance, on an extended float trip or if it will be a while before the plane comes back, we would put the meat in a large garbage bag and submerge it in the river. We would do this each night, in the morning, take it back out of the bag, resume the float and do it again in the evening. It really helps chill the meat down, up here, our rivers can be much colder than our air temperatures in the fall. The other thing it did is, it helped prevent bears from finding the meat. A lot of times salt is more meant to prevent flies from blowing on the meat, not so much for preventing spoilage. Pepper can be used in a pinch against the flies not so much the spoilage. If your meat is starting to smell bad, don't eat it. Nothing is worth getting sick, or even dying for. We all know what bad meat smells like.