Ok thanks. I had heard that everyone had to be present for bus assignment portion. This was not the case?Check-in is first. Starts at 8:50 (some people line up starting at 8:15). This is just to get a bus assignment. That’s why you really only need one person to pick up a little character picture (corresponding to bus. You get one for each member of your party - stapled together).
You will come back later (unless it is already time) for the Meet in Lobby - your entire party must come down, stand in line, and then go together to the bus.
Check-in and Meet in the Lobby are all the same general area - a ballroom near the hotel main desk.
Hope that helps.