based on last 2 years, there will be a huge increase likely in middle of december. The business model is to reward the early pass buyers, and lock out those who procrastinate (similar to travel booking)
To be more precise, they will even say Epic passes no longer for sale, and you have to buy a differently named "all-resort Vail pass" for $1500+ or so.
This happened even with the low snow coverage last year, and not many people on the slopes, so this business model will not change no matter how the weather and season goes.
SWAF for child is going to be much higher than 36.50/day. You can expect It will only be $10-$15 discount on a regular price, and less for a child. In fact, I do not know if they will even have a SWAF for child discount, and SWAF may only apply to adult tickets (i don't remember)
Another option to consider is that if your lodging is not set yet, you can get often get a good package deal if you book through Heavenly Vacations bundling your passes and lodging together. These vacation deals are actually something that is dynamic, so you may need to call and discuss with their vacation agents, and they might not have the best deals for February available now. Especially if you are going to ski on blackout days, this maybe an option as vacation deals will be regular unrestricted tickets.
Other than Heavenly vacations bundling in lodging, there are no real other avenues to obtain significantly discounted lift tickets. (If you are a high roller gambler, you can get tickets from the casinos from which you have status, but really it's the casino's concierge subsidizing you to come gambling)
If you have detail questions, I suggest you call the season pass office or the Vacations bookings departments to get the info from the source.
Edited by raytseng - 10/19/12 at 8:09pm