Originally Posted by
daviator
Maybe it can even go on the top berth (I don't really want to put it down since that will impact my headroom, i think, but maybe the bag would fit up there even with the berth in the 45º position.)
It depends on the bag and on how the attendant stored the mattress for the lower bunk. I have stored a bag up there and returned the bunk to the fully closed position.
Originally Posted by
daviator
Worst case, I could put it on one of the seats and use the upper berth for sleeping.
Bad idea, for the reasons
zephyr17 gave. If anything,
zephyr17 was not emphatic enough.