If you're try to determine the times(dates) for camping, at the fringes of winter, good luck. Those are the two time of the years the weather is most capricious. You know of course, if you miss, the consequences at those latitudes can be for worse than inconvenient.
Winter can come at you full tilt out of no where, so be prepared because by then, we may not have any Brandy left to send out with the dog.