One very important prep that is often overlooked are good area maps on Paper …. everyone should maintain a map and you would be wise to create an overlay made of clear plastic with a permanent marker and a dry wipe marker with notes on areas on interest .
the local military bases,
Food supply caches ,
hardware stores ,
and civil services in your area …
Create a map using https://inkatlas.com and print it out — preferably in no more then 1:50000 resolution
Update: Inkatlas is no longer doing free maps like they used too ; ( but its still a great service and not too expensive