Originally Posted by
strickerj
From the discussion of the open sleeper ticket above, I wonder if it'd be simpler to just book it for both of them and then cancel his if he decides not to join us?
I'm confused. It sounds like you are suggesting each of your parents-in-law get an open sleeper ticket, but the open sleeper ticket allows the holder to join someone in an already-booked room.
If I understand the situation, I would suggest you reserve a room for your mother-in-law and add your father-in-law on an open sleeper ticket if he can make the trip. In this case, I would not book the open sleeper ticket until he is confident he will travel; that way, there is nothing to cancel.