After thinking it over, I came to the conclusion that ammo will be much more valuable than gold.
Just think of the delicious squirrel stew that a handful of 22 LR's can produce.
I have been feeding the neighborhood squirrels for years...so I don't think they will mind feeding me if the tables are turned.;-)
Back in the late 70s or early 80s NatGeo magazine ran a multi-part serial, which was itself an abridged version of a book by a guy who had walked across America, taking little odd jobs along the way to support himself and writing about his experiences.
I was probably about 10 or 12 when I read the story at the time, but one of the impressions that remains with me to this day was his encounter with an older gentleman somewhere in the midwest (Iowa or Nebraska?) who had survived the great depression by eating pigeons. After he got back on his feet, he made a point of going to a local park every day and feeding them. He had been doing so for some 30 or 40 years or so at the time of the article.