I'm thinkin' this trip has snowballed . . .
The ride from Matagami to Radisson was long, albeit longer than any of us planned. Driving home from Radisson last year, we were on the road way too late, especially in a snowstorm.
I'm frankly thinking we should return to the "long holiday weekend excursion" plan of last year:
Friday and Saturday - drive to destination
Sunday - sightseeing
Monday and Tuesday - return home
My sense is that the current trip is virtually entirely day-long driving, with the exception of the one day with 3 hours in the MINI. With a bit of snow, a side trip, a flat tire

, any one of the days could be longer still.
As a practical matter, that last day is 16.5 hours from the coast of Nova Scotia to Suffern ~ or is it Suffering? As Ross notes, to break it up makes this a six day trip with an extra night's lodging/meals thrown in.
Bear in mind, too, that if you want to try sleeping for some part of the 7 hour midwinter ferry trip (probably not as smooth as glass), the cost for the car, people and accomodations is C$260 or US$220 for the MINI and two passengers.
Ross, is a winter tour around Nova Scotia a viable 5 day trip? Maybe with PEI thrown in?