Yes, all the rooms between the imperial bedroom and the Maple Drawing Room interconnect, so it's possible to walk the length without using the hallway at all. On the other side of the corridor, everything from the tsar's reception room to the New Study is connected. (I'm not certain about Alexandra's formal reception room or the small library. Those end rooms appear separate from the rest on my plans, which makes sense -- she could receive guests without them having access to the personal rooms.) The children's rooms were set up the same way -- you could walk from their dining room to the playroom without entering the corridor. I presume this could have had something to do with allowing access to the servants without compromising the IF's privacy.