My BoB goes everywhere with me. I load it IRT to the planned task or outing. My EDC and my PSK are with me at all times.

When I go camping, I load my ruck/backpack to go camping & to be my BoB. My EDC & PSK is on me.

On the boat, my ruck is loaded as a BoB for landing on a strange beach and finding my way home. My EDC is on me and a PSK is in my lifejacket.

I don't believe that 1 size fits all situations.