in an END OF THE WORLD SENARIO all tabacco products would be @ a premium! Tabacco (cigs, chew, cigars etc) can be kept for extended periods of time if kept in a humidifier. I have 3 small ones that I must constantly tend (adding water to keep the humidity up) but am planning on making one large one with a better more effecient humidifier. I recomend swinging by your local cigar shop to get an idea and talking to the teller about a set up for multiple types of tobacco. I plan on having an extencive store of as many different varieties; I chew and enjoy a good cigar too, this way if something happened the things I do not want or if the wife catches me, I can use it as trade...
When I was in IRAQ I kept 2-3 packs of AMERICAN cigaretts in my Bug Out Bag, yes the military still uses them, and thankfuly I never had to use it but I did use it to improve relations with locals and get information that helped, so if it worked over there it would definatly work here at home
just my two cents, hope it helps