I am a Fairfield owner and I can tell you that certain weeks are more difficult to get than others. It also depends on when you want to go . . . for some strange reason, certain weeks (high demand weeks at disney) are considered low season with BC. We stayed there back in 2004 when it first opened and loved it.
Now, the points I have through Fairfield I can trade with II, so, anytime we want to go to Disney, I actually trade through II and trade into DVC.
We have stayed 2 times at OKW (2 bedrooms both times), once at BWV and we will have 2 visits in May at the Villas at Wilderness Lodge.
I know we should book through Fairfield and stay at Bonnet Creek, but I just love the idea of staying at a Disney Resort. I love to feel surround by all the themeing 24 hours a day, and for less than 300 for the week to stay at a Deluxe resort, I just cant pass it up.