I travel about 40 miles one way every day to work. I have often had similar thoughts. Worst case: I get my bag and start walking. I have enough food, water, and ammo to make it providing there are no major roadblocks. Recently I have made friends with like minded ideas who live on my way home. I think if the time came, aligning with these people would give each of us a better chance of making it home, and a possible place for me to re-stock and rest before my final trek.(I live the furthest out) Walking isn't the most appealing idea, but I do not want to get stuck in the city any longer than necessary... The hardest part is "feeling people out" to see if they agree with me, or think I'm crazy...