Take your own copies of everything, in a carry on. My Vol II of my medical records were lost, my luggage didn't make the connecting flight. The airline delivery couldn't get on base. I couldn't get an online visitor pass because I wasn't stationed there, therefore no cac or outlook. Had to borrow an AF SP girls PT gear to wear to my appointments because it was the only type of "uniform" I could get my hands on. Got my luggage the morning of my hearing, with the help of a civilian lodging manager. My lawyer was awesome and explained both sides of possible outcomes and how long it would take to change the package, ect... The hearing is very "formal" as they record it and have to read a lot of mandatory script. My lawyer did most of the talking. The board questioned me for about 5 minutes, just to get more detail about symptoms and everyday life. They did not grill me at all. And my lawyer actually went over possible questions, so nothing unexpected. It was actually the least stressful part of the trip. The anticipation is the worse part. The board met for about half an hour directly after, and I sat in the lawyers office with him. And they called him in and had my results and my lawyer showed me where to sign to accept or rebut, given a copy, and went out to eat with my lodging suitemate to celebrate our retirements...
Try not to psych yourself out. Know that's easier to say than do, but the board is 3 Col; 2 doctors- one family practice, one flight med and their lawyer, who didn't say a word during the whole thing or to me. Just making sure it was recorded and done correctly.
Hope this helps.