I was in a similar situation - planned c-section in October of last year. I was put on the surgery ward because there were (apperently) no rooms available on the maternity ward - no private, semi-private or ward rooms (I think even the "deluxe" room was taken). I requested a ward room, but we would have absolutely taken any room that was offered on the maternity ward and we made that quite clear when we were admitted.
The hospital was quite busy while we were there, however my doctor had made the booking two or three weeks in advance, so they had plenty of advance notice that we were coming.
One of my biggest complaints is that each time we tried to discuss the situation (with admissions, nurses, head nurses, etc) we were told that, of course they would move me once a bed was available on the maternity ward. This story, unfortunately, changed throughout my stay - they needed to keep beds free for emergency cases, etc. By the 4th and 5th day, the maternity ward had almost completely cleared out, however, we were never offered to be moved. I left a day early, so by that time, it didn't really matter.
Because of the over-crowding, there were other issues - no space in the breastfeeding room, over-worked nurses. Overall, I had a horrible experience (on top of everything, they were doing heavy demolition on the 7th floor) and I hope you don't have to go through anything similar. Any other questions, feel free to PM me. Good luck.