From The Truth About Guns:

“Forget the super shelter,” he said. Instead, got together with a group of like-minded people with skill sets you will need in a location that allows for the safety and security of the inhabitants. This might be in Small Town, USA or it might be on a farm with enough shelter for a large group.

Either way, you want to join up with people with diverse skill sets. For example, you probably want medical professionals as well as those skilled in animal husbandry, agriculture, communications, dentistry, canning, marksmanship, tracking, security and so forth. (Odd how he didn’t mention lawyers on that list, isn’t it?)