Sometimes that is just the way it goes, but you may go to the hotel and be really busy. Some weeks I will look at my diary and see I have a busy week others weeks no advance booking only walk ups as I call them i.e last minute bookings, with 30 minutes notice. Very often I will have a more profitable week doing last minute bookings and they are less likely to cancel as it is all very need sex now. It depends where the hotel is but I would take the chance it is only early yet anything can happen.
Good luck x