Read this for a good idea what will work, this is the blog from a guy that is surviving the collapse of the Argentinean government.
Surviving in Argentina
You can check with a local pawn shop and buy a bunch of gold rings at current gold pricing or close, if you trust them. Look inside the ring it will be stamped with the caret which indicates how pure the gold is 24k being best. Search online for some of the better jewelery suppliers and see what they charge for gold shot for the cheapest way to buy bulk. I would buy 18k as it is what you will be paid for when you go to redeem it if tshtf.
I would think your best bet would be gold coins from a reputable coin dealer.
* American Gold Eagle
* Mexican 50 Pesos Gold Coins
* Hungarian 100 Korona Gold Coins
* Austrian 100 Corona Gold Coins
* Austrian Philharmonic Gold Coins
* Australian Kangaroos Gold Coins
* Canadian Gold Maple Leaf Coins
* Buffalo Gold Coins
as these would probably fetch full value when spent.
Here is some info on investing in gold
Gold
Best coin investment is the Krugerrand.
American Gold Eagle Coins
Minted at West Point, New York, American Gold Eagle coins come in four sizes: 1-ounce, 1/2-ounce, 1/4-ounce, and 1/10-ounce. The 1-oz Gold Eagle coins are by far the most popular and sell at small premiums over the value of their gold content. The smaller coins sell at higher premiums, and the smaller the coin the higher the premium.
American Gold Eagle Coins are 22-karat gold, which means they contain 91.6% gold and 8.4% of a copper-silver alloy. Because Gold American Eagles are 22-karat, many investors incorrectly believe that Gold Eagles have less than an ounce of gold. This is not so.