I have the advantage of having constant roommates, either in the dorm or on team trips......advantage that is if you don't care about privacy to empty your nuts.
I approach it head on, i come out early on and tell them i jerk off every night and most mornings and that i don't mind telling them so they can leave the room for a bit or i don't mind if they don't if they just stay. Lights our and just ignore the rustling of the sheet.
All but one time, and I'm talking about a lot of times, they have opted to stay in the room. Also almost all the time, their sheets end up rustling as well. Sooner or later it become fun and even humorous or competitive and the stories start getting told and eventually the light being off or being covered are no longer needed. Then like my dorm mate now, we do it at the same time on purpose, if either of us have a hot hookup to tell about we sit on the side of the bed and jerk off to the story. We learned long ago it was advantageous to have a washable rug (actually we have a few of them) in the middle of the room.