I love Mariott and over the last year it is like my second home.
I am however making a trip to Hannover, Germany ( april 3 to 7) and the hotel is already full becuase of a big conference there.
Is there any smart way to still find a room at Mariott?
Have you called the hotel directly to see if they are keeping a cancellation list and if so, can they put you on it? I would try that and see what they say.
PS, are you referring to one of the Marriott Courtyard Hotels there?