Wire door against pen should work for exposure.
I have never actually quarantined birds as I haven't brought anything but a few day old chicks home since I started.
But if I did, I would go the full month and be very, very careful about any cross contamination with clothing, shoes and equipment.
Read some of the links that I provided a few posts back on quarantining.
How do you plan on integrating the new birds with your existing flock?
There's no guarantee that first year layers will lay all winter without supplemental light...or that any bird will lay all winter with supplemental light.
I've only been doing this chicken thing for a couple years and have always used the lights.
I've found it to work pretty good, but some of my older layers molted in spring/summer instead of fall/winter
Here's my notes on Winter Laying:
Sometimes first year layers will lay all winter without supplemental lighting, sometimes they won't.
Older layers need 14-16 hours of light to lay regularly thru winter. Last winter I used a 40 watt incandescent light(this year I am using a CFL) that comes on early in the morning to provide 14-15 hours of light and they go to roost with the natural sundown. Last year I started the lighting increase a bit late(mid October), the light should be increased slowly, and the pullets didn't start laying until late December. Here's a pretty good article on supplemental lighting. Some folks think that using lighting shortens the years a hen will lay, I don't agree with that theory but I also plan to cull my older hens for soup at about 3 years old.