No you don't need to book in advance, i booked it at the gate and i was by myself not a part of any group, the place organize periodical tours its better you wait for one and join it to have the guide and avoid private guides as they will just want your money

We bought it at the door . We wandered around ourselves . Not necessary to book . No guide necessary. Not busy

There will not be long line up. Ticket costs about 9 dollars.

Любую профессиональную съемку нужно согласовывать с руководством

Yes, you can walk around the building free, once you paid the ticket for visiting the palace.

Поздно отвечаю Вам, но может другим поможет - да, там все оборудовано на сколько я помню

Πήγα με ταξιδιωτικό Γραφειο και τα εισιτήρια των μουσείων ήταν μέσα στην τιμή του ταξιδιού. Το μηχάνημα πάντως είναι δωρεάν και μεταφράζει ελληνικά.

kabatash