On me most of the time.One or two knives,light,phone, cash.Gun a fair amount of time.On my keys,Micra and photon II.
What I guess would me my bug out bag,would be my work bag,I forget the name but its made for police to carry junk in their cars.
I have in it at all times(home and work).Spare uniform,sweatshirt,extra knife,extra batteries for my work light,some first aid stuff,multi-tool,couple power bars,often a handgun.
This works well for me.As a floating TLT.I fill in at whatever firehouse needs a LT.So I'm away from my locker and need to carry spare stuff with me.Last night trick I caught overtime so I worked a night shift a day shift and the next night shift.Thats like 40 hours,so i get to see if my "stuff" is enough to let me live in comfort.Also a couple times I have had been caught in a blizzard at work and not allowed to go home,and getting out to by food was hard to do,extra clothes and power bars saved the day and night and next day....
For me and most people,I think you'll be "bugging out" to a shelter or home of a friend not building a lean-to in your favorite deer woods.
Look at the thousands of people who bug out every year in the U.S..They are most often doing so due to,hurricanes,floods.wildfires etc.and they go to a building of some sort in a safe area.