everybody has there own little list of things that make enduring a tough time in the field bareable...those were just a few of mine...surviving old school is pretty dull and you soon become fixated on food.
its great to be able to build a shelter like that should you find yourself stranded with no kit...but the time you spent putting it up could've been spent on other more pressing thing's , could have strung a tarp up for your bivvy in ten minutes tops , and it takes minimal space and weight in your kit.
were virtually at the winter equinox so you have less than 8 hours of daylight to achieve your chores , fire,foraging,fuel,water collection and sterilising,hunting fishing.....half your daylight hours on a shelter is not a wise use of time.
Don't get hung up on the stoneage!!! Evolution baby , kit has never been so small or good....and the essentials are not expensive so you can buy many multiples off.
swedish firesteel2 ...10,000 + strikes for £12 ...... buy 10...lifetime supply simples.