This might be a stupid question, Jacy, but are you not supposed to prepare notes/questions for the interview that you can refer to? If I knew of 6-7 interviewers, I would want to write down specific things about their career/history and ask them about it, but I didn't think I'd have to memorize that or sneak a peek at it while they're not there. Is it generally frowned upon?
Is it ok to plan a callback over the weekend? For example, fly in Thursday, interview on Friday, fly out Sunday, but just spend one night (Friday) at the hotel. The firm pays for the flight and one hotel night, but you spend a few extra days in the city. Do firms like it because it shows your interest in the city or frown on it because it looks like you're taking advantage of them?