Before you start Packing a Backpack For A Hiking Trip, it is a good idea to lay out all your gear and measure each item. Then, you can streamline your list and see which items are essential. Make sure to pack your sleeping bag and spare clothing in waterproof bags to protect them from heavy rain. You can also use old plastic bags as waterproof bags. If you can't find any waterproof bags, you can use the inside of the outer pocket for these items.