Rogue:
I don't EVEN need to tell you how often I have worked through that scenario!!! And, despite my insane obsession with Y2K (what a joke!), I learned a lot! I learned that nothing in the world is safer or dryer than 6" PVC pipe underground. There you have it. My #1 survival tip!
Just remember, lots of small bills, tons of quarters and all the 1/10 ounce gold* and pre 1965 silver coins* you can afford.
Len
* I do not own small bills, tons of quarters, 1/10 ounce gold or pre 1965 silver coins and have no plans to own any and strongly rebuke anyone who does. This recommendation is just theoretical.