I am not sure it is a matter of what I have because of playing T2K or more because I am the kind of person to like T2K and hence have these things...if you know what I mean. Anyone being a youth in the 70s has to have been touched by the possibility of WW3.
Off the top of my head...
A yew English Longbow and bits (bracer/arrows/quiver etc)
A ghurka Kukri (the wicked knife)
An African tribal dagger.
(I dont camp or go trekking yet I have..)
Candles, Torches, Mountain jacket and boots, 3 man tent, orienteering compass. Swiss army knife I carry at all times.
There will be lots I forget, but apart from the useless (until the apocalypse!) information my pride and joy is my 200+ bottle wine collection