Hi Brian!
As far as I know room 29 is the bedroom of Maria Fedorovna and Alexander III, room 33 is the Blue budoir, room 31 is a passage room, room 32 is Alexandra Nikolaevna's memorial chapel, room 44 is the stag chamber (and to my opinion former bedroom of two Veliky Kniaz, but I do not remember exactly, anyway they were two children of Nikolaj I. Look at the book with the watercolors, the French one, I mean)
and or room 38 or 39 is the study of Alexander III.
Room 18 is the so-called bathroom of Alexandra Fedorovna and room 19 is the white hall.
Hope to be useful. And forgive me if I made mistakes.