What day are you coming in on? Wednesday, Will Call opens at 12 Noon and is 24 hours. The Center itself is open basically 24 Hours for the Con for games. The Dealer Hall opens from 10AM to 6PM Thursday to Saturday, Sunday it closes at 4PM (I think).
Lines - that depends. Will Call can be 10 minutes to 20 minutes (2013 it was horrid) but they fix that. On-site events a bit longer.
As far as the dealer hall...Russ' pic from last year...somewhere it is an animated gif.