I’d personally quarantine them all, not together. The risk is some of the pullets from one place might be sick and than they’ll infect the others from the other place. After they’re done with quarantine I’d put them in the same run/yard area (making sure there is plenty of hiding spaces). I’d keep an eye on them making sure they aren’t getting to violent. They will peck and pull each other, but as long as they aren’t pulling out heaps of feathers leaving bald spots, or drawing blood, it should be fine. Make sure you have plenty of water and food sources, some need to be slightly hidden so if the other chickens aren’t letting them eat or drink they’ll be able to eat and drink safely there. I would just keep an eye on them and make sure every chicken is getting something to eat and drink. This is how I would do it.