No, not every time and it tends to be maybe 2x's a week that it happens. I have 5 kids in my daycare, 2 babies and no direct entrance to the daycare (it's through a gate and down 5 stairs) so its a bit of work. Plus, you have to take off their whole snowsuit to change them while the other kids stand around.

In the summer, not a problem. I have a potty I keep on my back porch or I change diapers on a change pad on the grass, easy.