I put together something like that as I anticipated an evacuation before hurricane Irma.. I'm single, retired, and have a simple will going to a relative...

will, living will and surrogate of health care declaration

NFA trust

car title

birth certificate, passport, copies of teaching certificate, and BA from UF

deed to house, and deed of sepulcher to funeral plots

combination to gun safe

credit union account number and PIN

5 signed checks for transition funds

latest quarterly statements from financial institutions, with brokers names and addresses affixed... spreadsheet of finances

historical wills for Mom and Dad to show ownership of house

directions for continuation of small scholarship in Dad's name to high school

documents are contained in a 50cal ammo can, in a grab and go location