where do you actually buy gold?
i take it not at the jewelry store 
I get it at a local "coin shop". I usually like my gold in known coin form, specifically US Gold Eagles or South African Krugerrands. In a pinch, the Australian "Opera House" 1 oz. coins are fine. For silver, I like US Mint Silver Eagles.
Food: freeze dried
Ammo: 5.56x45, 7.62x 51, 7.62x39, 5.45x39, 9mm subsonic and .357 sig.