Cutiebear, I wore a cocktail EG during cocktail reception. Before dinner commences, I changed to my WG. After first dish, I changed to 2nd EG. You will have a banquet manager to signal you to change, on time management, I think you can rest assured. I didnt change to any EG to send guests off. I still have quite some time to wonder ard, talk to friends, the fact that I have 34 tables.
As for the montage, I think quite okie lah. Cos the ballrooom lights will be turned off completely.