All these bunkers have a narrow window of usefulness. Enter too early and it becomes your prison. Enter too late, and well, you may not be able to enter at all. Live life, enjoy life and make some level of preparation. Too much prep and you can become a slave to the prep. What good will it do to have years worth of supplies if you have to leave them behind due to unforseen circumstances. A well rounded education regarding edible and medicinal wild plants, survival techniques and luck will go further in my opinion. Making it through the winter may be the biggest obstacle most will need to overcome