I used to buy into that "stock up on gold" theory. I even bought gold quite frequently when it was around $800/ounce. However, I sold it all last year after coming to the logical conclusion of it not being that useful. Instead I have replaced my gold stash with more food, water, supplies, and some silver. I also agree with Ferfal on the idea of easily trade-able jewelry. I think in order for a precious metal to be viable in any P.A.W. scenario, its value has to be easily determined. Gold does not have that charactoristic. Silver coins, jewelry, bullets, food, liquor, or supplies can easily be traded because most of those things share a common value. Gold doesn't offer that, except for large purchases i.e., trading two gold coins for a horse or whatnot.
All in all I figure keep a couple gold ounces for large purchases, like someones life, but stock up on silver and jewelry, liquor, or supplies for more common trades.