The newer St John units float
Erica:
The Bayview St John units float; although the 3 bedrooms don't have pools. Also, a 3 bedroom St John doesn't guarantee you a 2 bedroom Maui with StarOptions - only a 3 bedroom Platinum Plus season is worth 148,000 Star Options. Our 3 bedroom, with a pool, is only worth 95,700 Star Options - which is why we would never be able to trade for a 2 bedroom Maui unless we did a direct exchange with an owner.
Westin St John is very popular so even though a resale ad may state that the week "floats", the Hillside (older units) are fixed weeks. They can "float within their season; ie. a week 17 owner can request any where from week 16 - 20, 43-50, but will only get that change if the owners of the desired week want to change their week for something else. We have, a couple of times, managed to get week 16 for week 17, but it's hard.
I think Starwood is a much better option for you than Disney, especially since you want St John - you'll find it hard to get there unless you can do a direct exchange. I'd only consider trading my WSJ three bedroom for a 3 bedroom at Disney on a holiday week. There are a few November resales out there, and they may still have a few weeks at Hillside left (they weren't sold out of all units last time I checked, though it may have changed).
As a WSJ owner, I'd be happy to answer any further questions you may have if you'd like to email me.
Lori