We're talking SHTF/EOTWAWKI scenarios here, not a minor blip like a weather event or earthquake.
Gold has and always will have value. If there ever is a scenario where paper currency is worthless, gold will still have value.
Personally, I would keep BOTH paper currency and gold available.
Paper currency is going to be good for short-term emergencies like flood/hurricane/tornado/earthquake, where the systems for credit card transactions are down.
Gold is going to come into play where the system collapses, and paper money is worthless.