Hmmm interesting question. If I had a bunker, all my important stuff would already be in it!
But if it wasn't.
A. I would get my fiancee to drive round and get my sons from my ex wife's house..
B. in the mean time, I would throw down my 1. Camping Rucksacks
2. My small bookcase (has all my foodcraft/edible sea shore/plants books etc)
3. All cans of food/water from the larder
5. .22 rifle and ammo. (Game will be small in a true apocalypse)
C. Throw in sons,wench, grab the tortoise, cat and rock dove and pull down the hatch!