My fiance and I are going to be staying at CN March 21-28 for our honeymoon. We booked a deluxe garden room on a Wednesday special a few months back since that was just under our budget. Depending on how much we receive in wedding gifts and donations to our couples registry, we would like to upgrade our room upon arrival.

During this time of the year, how likely is it that there will be suites available for upgrade and about how much approximately would it cost to upgrade a room at check-in?