Ok, I am comfortable doing this. I have kept the door open between her pen and the rest of the run all day yesterday and no one seemed to have any marks or injuries

I am going to open it all up this afternoon. They will be 5 weeks old this Sat, so they gotta learn and there is more than enough space, roosts, feed/waterers and hiding spots in the run with space for 25 and I only have 12 counting the chicks.
Let her run free in the coop and roost too? If I didn't have to enclose her my life would be amazing. Mama hen takes them to a nesting box now so they aren't on the floor.