Ditto on the dry bag sentiment. I hunt the rainforest of SE Alaska. My backpack is never considered a waterproof vessel for anything. I even put my spotting scope and binos in a dry bag and they are considered waterproof. Just like above a three pronged approach to the bag system is applied. Sleeping gear, Clothing, and food. When game is down my bags are big enough that I can alternate and modify the strategy. I use dry bags for game meat often. Everything doesn't stay in a pack 100% of the time either. So say you stop for make camp or have a meal things start flying and are exposed to the elements. Keep your essentials protected. Often before I've even hit the trailhead my pack is soaked from a wet boat ride. There is not expectation of dry where I live it's just about thermal management.