What to expect in Monday's interview?

[JadeNB]

I applied for a green card for my wife just after we were married on May 11, 2009. We received an appointment for an interview in Detroit on August 25, 2009, but we had moved to Texas in the meantime. The appointment was rescheduled at the Dallas field centre on September 14, 2009 (Monday).

I am wondering what to expect, from the small details to the big stuff. My 3 biggest questions:
. Does anyone have enough experience to say if there is there reasonable parking available at the field centre? I have never been to Irving. The web page says that there is public parking available, but nothing about how much.
. I was married before, and applied for a green card for my first wife. It was granted in 2004, and we divorced in 2006. Should I expect extra scrutiny / challenge because of this?
. Is one actually asked questions of the "What sort of toothpaste does your wife use?" variety? I'm really bad at remembering these details, and am wondering if there's any curve ball that I should expect.
. Is there a general impression of whether the Dallas field centre is a pleasant or an unpleasant place? My dealings with my first marriage (many years ago) were all with the Chicago field centre, which is very unpleasant, but my one piece of business with the Detroit field centre were easy and pleasant.

Thanks so much to anyone who can help relieve my nervousness about what to expect.

UPDATE: I forgot to ask another one: At my previous green card interview, the interviewer asked for a set of passport photos and paystubs for several previous months, although the interview letter had not requested them. I had been warned about this, so I had them with me. Naturally, I am also bringing passport photos and pay stubs this time, just in case. Is there anything else that I might be expected to bring that wouldn't have been mentioned on the interview letter?