I think the special rate hotel rooms are all gone, but you could certainly get a room at a regular rate or find another hotel. General admission tickets for the fair are still available.
Yes, you can still go! If you're on a budget, then you might want to think about staying at a nearby hotel, as all of the rooms with the special lower Fair rate are booked up. Also, all of the ticket PACKAGES are sold out, but you can still get a regular weekend admission ticket to the fair. You probably will not be able to get one of the fair exclusives however, unless you get there super early to wait in line, or unless it turns out that the exclusive is something that a lot of people don't like!