I have a layered approach. Bobs for the adults in our bedroom, bobs for the kids are spare diaper bags kept in each vehicle and the normal diaper bags. Next layer is our suitcases and the 'pack and play' portable cribs for the kids. Next layer is the gear staged on the shelf in the garage, food, water, portable grill, camping gear, etc.
If something would force us to leave our home its more likely to be localized where we would drive to a nearby hotel so we may use the first couple layers but wouldn't need camping gear and such.

When we bug out to the camp site we will take everything including the kitchen sink