More plans:
http://www.earthbagbuilding.com/pdf/UN%20earthbag%20shelters.pdf
Preppers you many want to consider adding sand bags and barbed wire to you preps. I know I am!
Why would you hide in a little hand made cave instead of taking up arms, if things get bad?
If things go to hell, I can not imagine not putting one.s life, fortune, and sacred honor on the line to restore things.