I would let her and the chicks out of the crate inside the coop where they are to live. Try to empty the coop beforehand and block the others outside. Then watch how she is behaving. She should exit the crate with the chicks following. She should then start foraging and showing them where to get food and water. She also should viciously go after the other chickens outside who come near her chicks. If she seems to be protecting them and keeping them with her without pecking them, I would say you are good.
I have never kept a broody inside a dog crate for that long after hatching her chicks. Usually I open the gate on the 3 rd day once all chicks are hatched or I have candled eggs and tossed the ones that are not going to hatch.