I ran out of wipes, once, when we were on vacation.  Even though I had packed one of those huge packs from Costco, and even though I had a backup in the diaper bag, we ran out.  I remember the panic that came with knowing that I had no more.  It wasn't even that big of a problem, really.  It meant an extra trip to town to go buy more, but that wasn't a huge deal.  I missed an hour of time with my baby, and Tom had to deal with some witching hour antics by himself, but it was fine.  I ran out, bought some more, and our crisis was over.  I remember I barely even paused in the aisle with the wipes.  I grabbed whatever was closest, and was on my way.