First you'll need to find water. Water flows downhill, encourages vegetation, and collects in natural caches, be they ponds, lakes, rivers, springs, rock depressions, or even leaves. Unfortunately, most fresh water sources are not pure enough to drink from (as they used to be), so you'll need to know how to purify water under most situations. Use any of these methods to collect clean, purified water:
I carry electronics also, but use a 1L dry sack ( http://pin.it/TST5oS- ) should Murphy’s Law define the moment. A larger dry sack is the ideal container for carrying my spare underwear (hot or cold season), and another dry sack is carried for bandanas, bandages, and gauze. A 35L dry sack is used as a liner for my Snugpak Sleeka Force 35 pack and doubles as a floatation device when sealed for hasty stream / river crossings.
You don’t need a huge space to store emergency supplies if you plan wisely. Use every inch of your storage space for efficiency and necessity. When buying emergency supplies, look for stackable items with minimal packaging or that serve multiple purposes (multi-function items are great because you get the benefits of multiple tools without using up all that storage space). For example, MREs don’t take as much space as individual ingredients. Buying freeze-dried food instead of ready-to-eat foods lets you store even more in a smaller area.
I took all my “kit” electronics ie solar panels etc, a duplicate luci lamp (how fun is this!), and some spare LED flashlight bulbs and wrapped them in overlapping wax paper with a dessicant pack, then foil, then wax paper, then a specific 3M dri-shield mylar anti-static bag which I closed with HVAC metal tape (like they use to patch a/c ducting). The tape and bags make for some sharp corners and I’m still pondering how to solve that. You can write directly on the bags with a sharpie or use masking tape to make a label. Every couple of months I open it all up to see if it’s working and/or corroded. It’s a total pain in the patootie to seal it up again but I sure sleep better. Didn’t really add any weight and I didn’t wrap everything just the backup/spare stuff. If there was some weird solar or other event, then I would dump the more EDC stuff if it stopped working. Hubby thinks I’m nuts but I sleep better at night.
Ideally, when traveling in the wilderness, it is best to carry multiple fire-starting tools, such as a lighter, matches, flint and steel, etc… Even with these implements starting a fire can be challenging in inclement weather. We highly recommend practicing fire starting in different weather conditions within different habitats. Good fire-making skills are invaluable. If you were to find yourself in a situation without a modern fire-making implement, fire by friction is the most effective primitive technique. Popular friction fire-making methods include bow drill, hand drill, fire plow, and fire saw.