I think that for airfare it is simply too soon. I know that for both Oct and Dec from Boston I am getting a very standard $203 price. I know that if I wait, I will certainly pay less than $150 and probably closer to $120. I want to say that 6 months out has been a magic number for me. After that, I start seeing the fare sales and good prices come out. Have you ever signed up for fare alerts on Travelocity? You can sign up to get emails whenever the price on a certain route changes (which you enter). You can opt for notices when the price drops or for when the price drops below a certain price (you name it). Sure you'll get notices for price changes that aren't for your dates, but I've also gotten several tickets to WDW, CA and MO through these notices over the years.
I am surprised about WL being full so early. I noticed that it was booked for the 1st week of Dec last year when I looked in the summer, but didn't know it booked so quickly. Have you tried booking single days and adding on? Also, have you tried various sources for the room? I've heard that some sources have different inventories available to them so maybe try a
travel agent,
AAA if you have it, calling CRO, booking online and maybe even expedia. I don't think the discounts that came out last year covered WL since it was so booked so you may not have to worry about that.
Good luck!