If your looking to try a backpack hunting trip and looking to pick up some gear, I noticed massdrop has a SD Zissou dridown bag available. Price below is for the 30 degree bag but they also have 15 and 0 degree bags and various length options which may be worth checking out. I think you can check out the detail at the link below if you're interested. https://www.massdrop.com/buy/zissou-plus-700?utm_source=linkshare&referer=HCL7E5
