Quite a list.... Of course everyone is different, with different scenarios, mentality, fitness and so on..
There is no such thing as a survival expert....
I personally would prepare longer than 72 hrs, and when it comes to my bug out bag/gear, i target for 5 days max, but depends on how long it takes to get to your Bug out location.... One of my bug out locations is 2 hrs drive or 4 days walk.... so i plan for the walk, although my plan A would be to grab my two bags, put them in the car and drive according to my plan...