First principles: It should be assembled and ready to go. Think of having to stay in your car for three days. Must be portable so that it doesn’t slow you down. Store in a sturdy bag or plastic tub with handles.

Really important:

1. copy of important family documents and prescriptions
2. soap, hand sanitizer, sanitizing wipes, and isopropyl alcohol
3. exam gloves and/or utility gloves
4. toilet paper, towels and toiletries
5. water and a water bottle for each person
6. feminine hygiene items
7. prescription medications and OTC cold/flu medicines
8. a non-mercury thermometer
9. change of clothes, 1–2 per person
10. electronics chargers
11. extra cash
12. list of important people and their contact information

Less important:

13. nonperishable food and water, enough for 2–3 days per person
14. pet food, supplies and water bowls
15. flashlight for each person with batteries
16. first aid kit
17. an empty, clean can (can be used for water or fuel)
18. can opener, knife, eating utensils and dish soap
19. coffee, tea and comfort beverages
20. personal nonperishable treats (e.g. chocolate, Oreos, mints, etc.)
21. blankets for each person (depending on weather)
22. a reusable shopping bag for each person
23. candles and matches
24. an umbrella and/or rain gear
25. batteries

Optional items:

26. water purification filter
27. portable radio (great if it offers access to shortwave and weather alert frequencies)
28. plastic sheeting, rope and duct tape
29. analog maps and compass
30. external phone/electronics battery supply
31. a locked box for storing valuables and medications