perhaps what you might want to consider is that you are odd man out. when it comes time to get up everyone is trying to get suited up in suits before leaving the berthing space. My advice to you would be to have more than one suit with you and wear a dry one when you go down for the night. First call you get up and leave the space and let the boys do what they need to do. Remember the first in the head is the first relieved and all others have to stand in line or jump over the side or shoot over the side. I know net doc and cavers can tell you how folks change at dive sites where there are no changing rooms and only parking lots with cars.