Sounds like they added some sound effects while the suit is moving! That's a nice touch. When I saw the first video of this suit in test phase I couldn't get past the plastic sound of the guy walking in what was supposed to be a heavy, metal, robotic getup.
I'm extremely jealous! I saw on Joe Rohde's Instagram that everyone on the trip would be given sketchbooks and pens that Rohde would use and he encouraged everyone to sketch what they see. Rohde said that sketching is not necessarily to create an accurate picture of what you saw but rather to create a holistic memory of what you saw.