This is a bit of a controversial topic. There are many differing opinions on the proper number of people in a group for optimized survival chances. Some people believe that getting a large group together is best. Some think a person should go it alone, maybe with a dog. I, on the other hand, believe in a small group. Ideally four or five. Seven is the max number of people that should be in your group. After seven it becomes hard to keep track of everybody. When you lose track of people you have an increased chance of a member of your party becoming infected without anyone noticing.
|If you know a Navy Seal, he is the leader. Don't argue it.|
This, in my opinion, is the system that will give you the best chance for survival.