Are 'urban' AOs acceptable for the contest?
my answer is YES. the rules do not say you must campout in the woods, all they say is that you must spend 24 hours outside.
its possible that you live in a large city. its also possible that when SHTF you cant get out of the city by car. you may be forced to walk some distance with your BOB to get somewhere safe. i think there is plenty of urban skill / " concretecraft " that can be shown and posted.... personally i would love to see this situation get posted.
if you setup camp under a bridge you kick ass!