On the Viewliner roomette If I am alone I ask the attendant to make up the upper bed. This way I can use the potty easily and still sit while the bed is made up. This might be a problem on rough track, but the only time it bothered me was on the Cardinal in Indiana and the car bottomed out so bad I would have woke up anywhere,
I have gotten a few strange reactions from attendants but they’ve never refused my request. Daze