I called Westin Reservations and spoke to a very nice and knowledgeable rep. She said the best way to do this is to:
a) Call exactly 12 months prior to arrival date and book the first side; let's say it's the studio side. Then ask the reservationist to put in a request to book the 2nd week automatically so that you don't need to call back a week later to reserve the the 1 bdrm side. This will be done automatically prior to 9am, so your timestamp should be excellent.
b) At 90 days out, call back and ask the Reservationist to drop x days off the 2nd week. It's important that you tell her that you want it to be done "through inventory" so that she doesn't cancel the original reservation and re-book it, thus losing your initial timestamp and view. Most reservationists will know to do this, but bring it up just in case.
This means that you won't be able to use the StarOptions for the excessive days until 90 days prior to your trip, but this is the only way to secure your view and original timestamp, so plan accordingly. She said that the only way to book a trip other than whole weeks in your home resort is to wait until the 8 month window opens up, and then you'd lose your view and timestamp. So if you paid for an upgraded view, it's very important to put in the reservation during the home resort priority period. If you wait til 90 days out to add those 3 or 4 days, you'll lose your view.
Hope this helps!
