Moving into and living at Hammerschlag -- tips wanted

Moving my son into Hammerschlag dorm at Carnegie Mellon in August. Trying to figure out what he’ll need to supplement the furniture that’s already there. Specifically, I have 3 questions:

  1. Does he need a headboard and will a normal twin size headboard fit a twin xl bed?
  2. He’s very tall (6’4") and the desks look low. Should we ask maintenance to take out his desk and bring in his own?
  3. How do we hang stuff on the walls? They look like cinderblock in the photos.

Any other move in advice, especially for dorms on the hill, much appreciated! Thanks!!