Amen, sister!
The chicks should actually be better off than any in a brooder, because they are being hen-raised. They should be able to tolerate ventures into fresh air early and should feather out faster. If you look back through earlier pictures from this winter you will see a number of forum members posting pictures of hens out in the snow with chicks only a few days old. The exposure to fresh air and sunshine is available to hen-raised chicks because they have her there for warmth anytime they are cold, and I personally think it makes for much healthier and hardier pullets and cockerels. Just like dogs that are outdoors for several hours a day have that incredibly robust glow, so do chicks with outdoor access.
I know I already said so, but I am enormously excited for you. Really crossing fingers for a great hatch