I just answered the questions asked. I would say dont offer any more info then they ask.
My mom came with me and answered questions as well. Again I would tell your family/support person to just answer the question asked and not volunteer more info.
Mine was just with an administrative law judge in a small room with the recorder person and employment person that says if they think you could be employed with your disablity. I had my attorney and mom next to me. I was really nervous but it really wasnt that bad. It took maybe 30 mins.
Hope that helps