When on you're own, it is important that you are as prepared as possible, as getting stranded could be a very huge challenge. While the waterproof survival bag is very important during the raining season, you might however, sometimes have to cross water bodies, even when you are not expecting the rain.
A waterproof backpack would keep all your things dry. This would save all your electronic devices that are not water resistant also. Be confident to go out to waterfalls, flooded area and during rainfall with your waterproof backpack.
You can stuff your bugout bag with anything according to your personal preference. Keep things of the most significance in this bag as it will be the closest thing to you during the emergency times.
It is preferable to keep water, food, clothes, and other important things in your bugout bag. You should have one bag per person in your household, with an additional one for important papers and documents!