The North Building (it is labeled as such on the front door)
Yes, there will be buses available both to and from the venue. The first bus departs the Hyatt Regency at 4:30pm, with two additional buses leaving the Hyatt Regency at 4:45. If you head down to the lobby they will be waiting outside at that time. There will also be buses available from the venue back to the Hyatt Regency starting at 10:30pm. The last bus leaves Artifact Events at midnight and makes two stops - one at the after party at Mother Hubbard's, and one back at the Hyatt Regency if you're ready to call it a night!
Yes, there is free parking available all along Ravenswood Avenue, right outside the venue.
Both the ceremony and reception are black tie optional. The vibe of the venue and event in general is cozy/fall/moody, if that sparks any inspiration :)
Yes, there will be a coat check available when you first walk into the ceremony.