Behind a door is an excellent choice for placing the panel.
I see your point on outlets behind the door. Maybe it is not so bad.
But, I still think one in the hallway would be a wiser choice. My reasoning is that those in the bedroom must be on an AFCI circuit, and therefore they will not be the best choice for some vacuum motors. Arcing and sparking in the motor causes nuisance tripping of the AFCI. Until the manufacturers come up with brushless motors for vacuum cleaners, IMHO, use the outlet in the hall.
