@3riverschick ... we do something similar here. We have the broodies set on eggs on the floor of our big coops in broody cages (formerly brooder cages, for hand-raising chicks). The cages are about 6' long and just wide enough to set a double divided nesting box across the short end (about 2'). Feed and water at the other end. We can start two broodies at once in these cages. We give the hens a night or so to get settled before we add the hatching eggs.
We remove the nest divider when chicks start to hatch, and when most are hatched we carefully combine the clutch so one hen can sit on late hatchers and one can feed the chicks. This is also a good time to slip in any "foster" chicks, if you want. When the chicks are listening to the hens (maybe after a week or so, sometimes sooner, sometimes later), we remove the cage (just roll it to the side, let the everyone out) and then we can start another set of broodies.
With two hens started on eggs on the same day, they seem to co-parent really well. One hen will usually stick with the chicks for longer, but the other is nearby. Occasionally we do have to confine a "family" if the hen gets lazy, so we have a spacious cage for that. Otherwise, they free-range with the rest of the flock.
We also have a special feeding area for the chicks.
I love having the broody hens raise the chicks. Then there are no integration issues, no issues with cocci, and the chicks are so active. For me, the only issue is waiting on birds from the laying flock to go broody so I can hatch. I keep wondering if I should get a team of silkies or something.