It's called a Domestic Violence Safety Plan because the packing a proper suitcase could tip their abusers off - not a Bugout Backpack - although it could be inside one.
Here just part of the list from
clothes, cash, savings, check books and other valuables. Prepare children – take something meaningful for each child (ex pillows) – assist in easing the transition. Drivers license, social security card, birth certificate), copies of restraining orders, evidence of abuse (medical doctors/medical records, police involved, witnesses.