I always advertise. You never know what can happen. On any given day someone could give you notice and I want to have people lined up. Also lots of people enquire way to far in advance unless by chance you know a child is going to school or a parent on mat leave who will be pulling their child. I do not wait for a spot to open up to advertise. I keep my advertisements active to enquiries for my availability because while there are families requiring care within a week or two, there are still by far more, in my experience, who plan ahead and are looking for the future which we have no way of predicting. I don't think it's wrong what you are doing sandylynn.