If you're serious about survival, then a survival plan is a MUST. You and your loved ones must know what to do and where to go in the event of a natural disaster, civil unrest, and so on.
Not only that, but once you and your loved ones are together, a military style chain of command is essential. Who is going to be in charge, what will the roles be of each person in "your unit"?
Additionally, and this is where many plans trip up ... what personal space will each person have?
In the event a "suvival situation" is necessary, living quarters tend to get tight. That means that some amount of personal space will be important. Further, it is just as important for that personal space to be honored. NO ONE should violate the personal space of another person.
Now let me be clear about something. I'm not talking about "personal space" to mean the area around you, I mean a box, a bug out bag, some (should be small) space in your house if you can stay there ... some small space where personal things can be kept that no one else is allowed to go into.
Each person should have something like this. Even on the International Space Station there is a "personal space" (a small box not much more than 3 or 4 inches along each dimension).
This is important and absolutely should be part of your plan.