I did this too!! No issues with attendant, they just said sure. I liked sitting cross legged looking out window. And as a light sleeper, was all set for short naps! Also I was alone in the roomette.On my trips in a roomette, I found I was more comfortable with the bed made up all the time. I used my airline carry-on sized bag as a back rest support (with the pillows) during the day. I’m short, so there was room for my cpap on the bed. I carried a power strip which provided more outlets for charging and using the cpap. I don’t know what I’d do if I had to share the tiny space. It was good to be able to lie down when I got dizzy from the train motion. In the future I will bring something I can use as cup holders to put on the little shelf next to the seat/bed.