I'm not saying this is what you should do. I am saying this is a likely scenario. If you want to protect your family from this you need to have enough water, food, fuel, and medical supplies to last the duration of a disaster - say 30 days minimum.
If you don't are you prepared to watch your family starve or go without essential medical treatment so you don't have to fork over your guns. It's not necessarily day 1. It might be day 20.
Just opinion but it's why men should learn to feed themslves, someday they may have to.
Would this government turn away you wife and kids if you don't give up your guns?