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