People arrive on different days through the week.I think it's personal preference as to what hours dealers open their rooms to the public.There is room trading leading up to the show on Sunday morning.I usually get to the Hyatt on Saturday morning and wander for a few hours.Then on Saturday night and Sunday morning,everything is moved downstairs in preparation for the actual official show on Sunday.For $30 I believe on Sunday,you can get early access to the show before it opens at 10:00 am.Early access lets you in at 7:00 I think.This is year number 12 for me,always a good time.