I attended the Primitive Skills Meetup tonight [http://www.primitivechicago.com/events/63421742/] talking about Wilderness Survival Kits. One of the attendees asked about a ‘rule of thumb’ for the size of a survival kit. The unfulfilling answer was ‘it depends’. We discussed from an Altoids tin to a rucksack. The ‘Rule of 3s’ was laid out in class and …