Saintsman
Did this in a previous life as an aeroelastic engineer with Canadair for the RJ and the CL-415 Waterbomber. From memory it took a few days for the technicians to instrument-up the aircaft and about 2 days for us to take the measurements. I guess a bit longer for a widebody.
No problem with nearby activity - we just did it in a corner of the hangar near the Challenger production line. I don;t suppose you'd want someone nearby with a jack hammer though.