when they hatch move the nest and poults to ground level, they will take a day or so to hatch, once the first poults come out and start chirping the hen should stay with them. When you move the nest make it so the hen can't get back to that nest site, she will try and if she can she might forget the nest with the poults. Also, once all the poults have hatched if you have a secure pen for her and the poults they will stand a better chance of making it.
Steve in NC