Most of the winter rentals will be posted towards the start of next season (Sep/Oct), but if you put out a feeler now you might get a bite and be able to lock a place down at a better rate.
The scam listings on the Stoke all have a pretty similar writing style. Basically if it sounds too good to be true, the renter is located anywhere OTHER than Revelstoke and you can't meet them in person to see the place, it's a scam.
Will you guys have vehicles? If you're planning on catching the shuttle to the hill you may want to make sure anywhere you're looking at is fairly close to the shuttle stops (http://www.revelstokemountainresort.com/resort/resort-shuttle).
Walking long distances in ski boots sucks.
Good luck, and I hope it's a good season. :)