Take a moment and contact you local FEMA or state or town equivalent and find out the locations of the official shelter, comms, and other facilities are in their plans that are within 2 hour walk for all in your group. So if you walk 1/2 hour one direction and spouse 1/2 hour the other direction then your locations would be within the 2 hour circle with your home as the center.. If something big happens those will be the most organized lawfull places to meet and hang out while waiting. If you choose to "go it alone" in this regard then you should carefully discuss and decide on your security provisions before considering meetiing locations. Most likely there will be a hospital, police station, fire station, church, salvation army, high-school, or even a diner all within your walking circle that will be designated as an aid station or shelter in the emergency planning of your municipality. Getting all of your family members to one of these is your best bet. Once that is established you may be able to use the comms facility of the "system" to find which shelter the others are at. If you can't then you may wait for "the smoke to clear" and then proceed to the meeting place still standing. Have one in each quadrant of the compass within your 2 hour circle. Plan to check them in order N - E - S - W. Leave notes at each you pass so that your family members know you have been there and which shelter you are currently staying at.