Bobwhites need to be kept in pairs during breeding season. During the off season, you can keep them all together for the winter covey. But they need to have their own territory during breeding and can hurt each other badly if all kept together. So one male to one female. Any extras will need to be kept separate as the females will go after lone females and hurt them. You can keep all roos together or all females together for these odd bird out situations. Make sure neither of these males or females can see one another either. Out of sight, out of mind to keep the peace.
BUT...many times first year quail CAN stay together because they are still not yet mature. Bobwhites are not completely mature until they are 1 year old. So sometimes they will play nice this first year. But come next year, they will turn into little monsters during breeding season and you will need to separate the pairs. You can remix them in the late fall til the following spring.
It is rare for Bobwhites to go broody and raise chicks, although occasionally it does happen. They will set on eggs for a day here or there, but not constantly thru the incubation cycle. So you can either let them play house, or incubate them yourself.