Disasters come in all different shapes, sizes, and probabilities. For example...
TEOTWAWKI: Major global event. High impact on you, me, and everyone else. Low probability of happening in my lifetime.
Regional: Affects everyone in a geographic region. Volcano, hurricane, Rodney King riots, etc. High impact on everyone in the area, low/no impact on anyone else. Moderate probability of happening to me in my lifetime.
Personal: Affects just me. Loss of job, death of spouse, car crash, house fire, etc. No impact on anyone else. High impact on me. High probability one of these events affecting me or someone I care about sometime in my life.
The preparation for all theses events is the same. Since we are all likely to experience a personal tragedy, why not be prepared?
So if I have 6 months of food stored, and I lose my job, wouldn't it be nice not to worry about having food to eat tomorrow? If the power goes out, wouldn't it be nice to know how to cook on a wood stove and have a generator?? And whether the zombies come or whether I need to put my own meat on the table, wouldn't it be good to have some 'tools' and the training to use them?
My point is, being prepared just makes sense. If the zombie apocalypse is what motivates you to get ready, that's fine with me and I won't mock you for it. I know you will have some measure of self-sufficiency available when the inevitable personal tragedy strikes any one of us.
As for the OP using a camper for a BOV... It depends on the situation. If I have advance warning of a localized threat and I have the opportunity to get out of the area, of course I am taking the camper and hitting the road. What is the worse case?? I get an unscheduled three days camping and a false alarm?
I've got the camper. I've got a brain on my shoulders. I should use both wisely.
-Eric