Shaving post SHTF

[Skvez]

If you're bugging in a few bags of disposable ('bic' or similar) razors are the way to go. Pretty cheap and last a good long while if you use them past sharp enough to get 'baby bottom smooth' and into 'a bit dull but still trims to short stubble'.
As to whether or not the ladies will want to shave underarms and legs or keep the hair for warmth … we'll have to wait and see.