Exactly, my bag is a "Car bag" . If I have to hoof it I will adjust accordingly and only pack what I need for the trip.Just because you have everything you might need for any SHTF situation doesn't mean it all has to go with you. Depending on what the situation is, you might be able to leave some of it behind.
6 packs of bug wipes and 2 bottles of sunscreen certainty comes in handy at sporting events, not needed for a 3 day hike home.