You’ll be hard-pressed to take too many plastic bags. Obviously, you can use them to keep items dry or use them to organize loose items, like cooking utensils. Even if your sleeping bag’s stuff sack claims to be waterproof, put a tall kitchen trash bag in the stuff sack before cramming the sleeping bag home. Plastic grocery bags can hold trash in a campground or wet clothes until you have a chance to hang them up to dry. Finally, you can reduce the volume taken up by your clothing by putting it in gallon zip-lock bags, squeezing the excess air out and then sealing it. The photo above shows three t-shirts, three pairs of underwear, and three pairs of socks that will take up about half the space in a saddlebag than they would loosely.