I want to go to "Art and Imagination: Animation at The Walt Disney Studios" and "Let the Adventures Begin: Live Action at The Walt Disney Studios" in the D23 Arena on Friday and Saturday around 10am-ish, but how early should I get there to start lining up? I saw something that said people couldn't start lining up until 5am, but I didn't plan on getting there until 7am. Is 7am too late? I don't want to end up in the overflow room. Should I come at 5am to avoid the 2000-seat overflow room? Thanks.