Funny you should ask. We took our 2 kids with us and we had the same set up, two uppers and two lowers. My daughter sleeps all over the place, I was scared she was going to fall off the upper so my husband slept up there and she slept on the bottom. He is an average size man about 200lbs. and it didn't even squeak when he got on. I was worried at first but after seeing him on it, I felt satisfied. My daughter even hung from the side by her hands with her feet off the ground while he was on it and it was fine. I don't think you will have a problem. They do offer rollaways but for two of you to sleep on them, I don't think there will be enough room.