I am and have been in a primarily old style and athletic oriented dorm.
But from the first minute I made it a non issue. I changed regardless of who was around. I walked down the hall to the showers however I was dressed........which might have been totally naked, wearing a jockstrap, underwear, including briefs if that's what I had on, or whatever. I usually walked back to the room naked and still rubbing my hair with my towel or maybe with it over my shoulder.
With all this what I choose to sleep in or not was not a big deal and I wasn't going to ask permission from a peer.
You will inevitably need to address the morning wood or boners anytime for that matter if you are going to be total naked some.
I started the first night telling a new roomie hey man I jerk off almost every night and I enjoy it, I am not going to try to stay up til you fall asleep before I do that. If it bothers you that much let me know and I will alert you to leave the room while I take care of my pre sleep needs.
I have never had a roommate in the dorm or on a team trip that had a problem with the nudity or the jerking off. I heard every one of them rustling their own covers by at least the second night.
I made no effort to hide morning wood from the very first morning, probably even lingered to make a point I would not ever be embarrassed in my own room.
My body, my clothes, my dick, my ass, my choice.