The 'small of the back' is a wonderful place for holding/hiding things. Most fanny packs are too large to fit there without a bulge that would show under a suit coat...but you can make your own fanny pack that is much smaller and that will fit and it can hold many items that you would find nice to have in a city building evacuation. Build it now and get used to wearing it...put it on after you put on your watch (or whatever) so it becomes routine...