actually, one of the advantages of large format is the narrower depth of field -- why do you think old pictures look so good? the narrow depth of field automatically (!) isolates your subject, which looks sharper as a result.
Avoid the upside down image the easy way -- get a speed/crown graphic with an external viewfinder.
i was hand-holding speed graphic shots at a 30th of a second today (cloudy day) at f 4.7 -- the bulk of the camera damps the vibration down, I am optimistic.