It's really important to remember that everything that you pack weighs something and it all adds up. Humping "stuff" gets heavier as the day wears on.
Titanium is great - Aluminum is lighter but, you do not really want to eat out of Aluminum cookware these days.
Buy yourself a BLASTMATCH & Some WETFIRE and one or two packs of STORMPROOF Matches. That will take care of all of your fire needs. The wetfire is great (hardly weighs anything) and you can break off small chunks of it to start a fire in a downpour and when there is no readily available dry tinder around. The BLASTMATCH is superior to all of the other ferrocerium and magnesium fire starters because it gives you a shower of really hot sparks that burn hotter and longer. You can search blastmatch and wetfire and stormproof matches on youtube.
For water you should buy an Aquamira frontier PRO and some Aquamira water purification tabs. Both fairly inexpensive and great and lightweight for one week in the woods.
Add a collapsible water container or a Hydration pack.
You should take a DATREX Emergency Ration pack just in case (by chance) you find yourself lost and alone. That will give keep you going with some very basic nutrition for three days. Not really lightweight but, compact, waterproof, and the expiration date is like forever. The DATREX will give you your calories, fats, Sodium, some protein and and essential vitamins. Very worth the (guessing) 1 LB weight.
You COULD substitute MILLENNIUM FOOD BARS which taste better and are available in many assorted flavors.
Everyday food MOUNTAIN HOUSE dehydrated/freeze dried is the best tasting.
WISE FOODS (some are OK but some of them totally suck) I would try and stay with MOUNTAIN HOUSE.
One item that will absolutely save your life if your sleeping bag gets wet and you are not into emergency shelter building is the SOL (Survive Outdoors Longer) ESCAPE Bivvy.
Measures about 4" X 8" as it comes packed. It is heat Reflective Waterproof and Breathable and reusable - I would take a SOL Escape Bivvy sealed in a ZIP LOC bag and leave those foil emergency space blankets at home because they are really NOT very effective and they are outdated technology.
With a SOL Escape Bivvy - and anything underneath you (leaves pine branches) to keep you off direct ground contact - and some leaf cover on top you could survive a Winter night with just the SOL and it only weighs slightly more than 8 Ounces.
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So there you are for very basic last ditch FIRE, WATER, & Shelter with hardly any added weight.
ADD a Leatherman knife and your favorite BUSSE.
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Don't forget a bottle of DEET to keep the buggies at bay.
A mosquito head net hardly weighs anything and is worth its weight in gold when skeeters and biting flies are swarming your face which can get downright irritating if you are not used to it.
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A bottle of biodegradable Camp Soap is great to have with you.
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Some Wound Closure Strips and some Iodine and a package of CELOX and some gauze bandage - in case you get seriously gashed open in the middle of nowhere.
You can disinfect and "wound flush" with some Iodine and purified water - use the CELOX to instantly clot the bleeding and close the wound up with the closure strips until you can seek professional medical treatment. The CELOX has saved many a life because it even stops major arterial bleeding.
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There are youtube VIDS on nearly all of the above in case you want to see anything before you buy. These are some things that have always worked for me.
Personally I love to rough it but, I always hump extra stuff when I venture out with my better half.