Adjustment of Status - I-485

Hello everyone, I have submitted my application for permanent resident on October 7th 2015. I got my EAD card in for weeks after I applied, also done my fingerprints in that period. As of December 2nd my case was ready for an interview. I been waiting 8 months. Few weeks ago I applied for my Travel document because I might have to go home to visit family, my travel document arrived in 2 weeks on my home address. Then I moved and changed address, after I changed address my case status changed to "As of June 7th your case is ready to be scheduled for an interview." So I have few questions, first when I can expect my interview? I been looking on time processing for Des Moines office and they currently working on August 15th of 2015 and I submitted my application in October. Second question: Can I travel with the travel document that I received in the mail? I got two papers with my photo on it and place for the stamp. Third question: I scheduled Info pass for coming Monday June 13th in Des Moines office, what should I bring there and can I expect more information on my case after I meet with the officer? If anyone can provide information on any of my questions please let me know. Thanks in advance.