You probably won't be doing anything at all as 4th plateau is analogous to a hole. Leave the room dark, get some good music playing (playlist, don't count on being able to change it yourself).
No driving next morning. Your cognitive functions and motor-coordination will still be impaired to some degree. Well maybe you'd be fine if you dosed really early in the day/morning, but in general I'd say no if you're gonna be dosing this high.