you could still use the same idea to store anything but gas.

Two BOBs come to mind. Maybe two stuffed backppacks plus a duffel bag with an additional change of clothes, cash, survival kits and few other goodies. Maybe spare glasses ..etc.

I believe in the basic pronciple of caching. Add or subtract details according to your specific circumstances.

Perhaps you could , for example, leave in your own mail box an envelope of few small bills, plus a page of encrypted personal data ( phone #s ..etc.) Be creative.