Visible crew/equipment: At the end of 'Sit Down John' as Adams is walking out of the Assembly Room, you can see a crew light reflected in the tally/vote board behind him. It's also rather bright in a room, at night, that is only supposed to be lit by candles.
Visible crew/equipment: In the film's final moments, as the camera revolves around the raft, you can see the wake made by the camera boat on the river's surface. (01:32:49)