At the risk of being a moralfag and obtaining lots and lots of puzzle piece stickers, I must ask, despite my Kiwifarms username, what would the purpose of moonshine or homemade alcoholic beverages be during an emergency?
It's best to be stone sober for these types of situations, and especially because the ability to exercise self-control makes you more able to stand up to your enemies and less susceptible to coercion. You don't want to be a slave to anything, especially not your own base instincts if you're predisposed towards alcoholism.
I can think of a few:
1. Being able to trade your booze for money or supplies
2. The ability to disinfect drinking water (might be a moot point, as unscented bleach or boiling might be better)
3. Fire starter or stove fuel
4. First aid disinfectant
5. Morale
Any other thoughts?