Recent humiliaton has led me to add a caveat to my list:
Trying out a sleeping bag in what's probably the last really cold night this winter, i had to erect a tent in the dark
as an aside; the bag kept me toasty warm in -4 so UK peoplel get down the army surplus and buy those cheap ex-army down bags on sale. waterproof base, rainproof when rolled up and the carrying handle and 2 toggles give you points to secure it on the outside of your rucsack.

Erecting a tent in the dark; moi? no problem! i've had that tent decades and put it up hundreds of times.
1 it wasn't easy; a few years of not putting it up and i'd forgot a lot.
2 oh how quickly i realised doug was right to reject out of hand any lights you have to keep a button depressed to work. primary light; completely useless.
3 no problem' i'm mr "and if i could only carry 2 items both would be torches" the second lights battery was almost dead. faded in 20 seconds
4 ah but ETS man has backups for the backups. spare battery in belt is; err... missing.
" do you have a torch dear?"

so however many items you carry; they also have to work and you need to have practiced using it.
The Sock