I have several aviaries, however all my birds live in one particular aviary during the winter months. I built this aviary up against a greenhouse. I cut a hole in the side of the greenhouse, stacked up cement blocks and inside the greenhouse is a large rabbit hutch. So this is their shelter. And since everybody ends up in this aviary, they all learn how to get into the coop when I want them to. The other aviaries only have large breeding cages where they spend the summer months.
What I did in the beginning was, get my quail net, (a small holed fishing net) and the clicker. Of course the quail are terrified of this net, having been snagged in it occasionally. LOL So while holding this net, I clicked my clicker and told them loudly, to "get into the coop". I didn't chase them with the net, but allowed them to see it. They automatically went in the opposite direction of the net and I corralled them into the coop. After a several days of this process, I was able to drop the net and just use the clicker all the while telling them to "get into the coop". Any new comers learn from the older quail.
Over the years they have learned the command to "get into the coop" and many times I can even go without the clicker. After the long summer of forgetting, of course I have to go back to using the clicker once again. Only rarely do I need to show the net, only on those stuborn quail that just don't want to listen to me. LOL
This was the only way I could get 100 quail in the coop for emergencies, (have had a few of those, LOL), to separate out a few quail or for those nights that are going to be sub zero and snowing. It has never failed me. Sometimes quail are not that smart and if you feel they need shelter, this method will get them where you want them.
Just make sure your coop has LOTS of light and air for ventilation, especially during wet humid cold weather.