@Robert
All I know is that you had better Record this with some kind of High Definition Video Camera...........rent it! do whatever you have to do to get a good quality cam. minimum 3CCD.
Try online or craigslist or whatever to see if you can borrow one.............but please record this...................heck.....bring a friend with another camera in his hand to capture another angle.
if possible get the museum to let you set up mics for good recording.
Please! This is a rare moment!
