You already covered firearms, but it went with the trio, so I won't go into any detail again.
Alcohol and tobacco are both good for calming you down especially if you are already addicted to one or two of them.
Alcohol also has medicinal qualities and nicotine can help you stay awake if you are in a pinch.
And their third and possibly most important function, bartering. When money becomes obsolete, like in a prison, the most valuable currency is a pack of smokes. They are even good to give away when trying to get allies.
I'd have to agree here as well, I love myself a pipe and a cob (id never bring an expensive pipe w/ me..) +some tobacco +the outdoors = a very relaxing weekend. Granted im definitely in "Casual Pedestrial camping" side more than "Survival" side, but hey.. whatever P:
