What fucking plan?
Good luck planning for bombs being dropped out the sky.
No one is invading the US with ground troops, unless that came weeks or months after intense bombing.
Your best bet is to know where bases, ammo depots, govt buildings, police stations etc are in your local area, and live like a mile away from them at a minimum and hope the attackers aren't dropping bombs indiscriminately.
Honestly your best bet is to have a plan against your neighbors than the attackers.
Luckily the US is supremely well defended by two Ocean, and then Mexico and Canada.
If anyone wanted to invade the US, the fighting will happen in Mexico and Canada well before it comes here.
But in the event shit hits the fan and bombs are dropping, just stay far away from high priority targets and then make sure you can resource guard against your neighbors.
You won't be seeing no attackers. By the time you see attackers physically, it's too late. You just wave the white flag and hope they not shooting civilians