I am also in Ontario and charge 170/week
I take 2.5 weeks vacation where I don't get paid and then as long as daycare parents give me two weeks written notice, they can take an extra 2 weeks of their own unpaid.
All stat/civic holidays are paid regardless of time away from daycare.

As a Mom who worked outside the home, I used to hate that my daycare provider used to dictate holidays and then if I was taking any other time off, I'd have to pay 50% of her fee. that used to dig into our holiday money that we worked hard to put aside.
Having the two weeks written notice gives me time to make adjustments knowing that I'll be missing that income for the time they are off.