I am attending a conference that week at the Swan/Dolphin. It is called Autodesk University. I'm not sure of the exact attendance numbers, but I would think at least 4000. I've attended this conference several times in the past. It has been at the MGM in Vegas for the last several years.
I understand we get MGM Studios all to ourselves on Wednesday night (Nov 30th) from 8:00 p.m. until 11:00 p.m.