When I am alone, I have a billion alarms set. I stress myself out like mad. I often make the intended departure time because I plan like Hell and I am mostly terrified because of experience.
When I also have the joy of being the executive function for an AuDHD teen, honestly, we miss a lot of shit, fight a lot because I am in panic mode, and the tasks that need to get done before we leave are generally done in haste and without deep conscious thought because I have to do EVERYTHING