This was a very tense interview for us. I did not quite meet domicile requirements, since I was not renting or owning a home in the US and was working in India at that time. I only had a bank account, credit cards and a 401k account. I luckily got a job offer literally about 10 days before the interview (yay! for contacts).
I emailed the consulate before hand to check if we could bring our 7 month old son to the interview, since he would not stay with anyone else. They were very good about it and sent us a letter which was really useful in convincing the security at the gate.