You shouldn't have a problem with the 2nd or 3rd week of September. F & W starts around the last week (this year Sept 28). Early December can be an issue at 7 months.
Definitely NOT doing F&W, at least not in the foreseeable future. We like having an almost empty park too much!
Also, while BW and BLT have plenty of general availability for mid-September, you'd probably not be able to reserve standard views at either resort at seven months every time. Same with the value rooms at VAKL. So if those resorts are particularly appealing due to the standard view rooms, you might want a few more points.
Ah-hah. That's good,

I think DH would rather stay off-site than not be able to soak up maximum Disney magic. He'd begrudgingly stay in a standard room if he had to, but optimal is a room with a nice view, LOL.
Another strategy some try, is to pick your two favorite resorts, buy half the amount of points you need of each in separate contracts, then bank and borrow to get the 11 month advantage at each every other year. You could do it with three, but it would be more elaborate and complicated. (In your case it sounds like you'd like one Epcot resort and one MK resort perhaps?)
Eg.
2012 - Use Resort A's 2012 & borrowed 2013 points
Bank Resort B's 2012 points
2013 - Use Resort B's banked 2012 points + current 2013 points
Resort A (has no points)
Rinse and repeat.
Hmmm. That's a thought. The thing is, we only manage to make it to Disney about once every 2 years, due to our work schedules. (For example, no trip this year because we both have big work projects.) I'm going to have to look into how that would work on a longer rota and how long you can bank points, but that might be a good option!

(And might get us to Disney more often than once every 2 years, which is not a bad thing at all.)
For early Dec, you really want to book your home resort because the time is so popular with members. Points are low and the holiday decorations are up. Plus the Christmas party is going on.
No, I don't think you'll have a difficult time booking for the 2ND or 3rd week of Sept at 6-7 weeks out. F&W starts at the end of Sept so no worries about that making it difficult. And since it sounds like you wouldn't normally book in the home resort priority it also won't matter where you own so your probably best off buying the least expensive resort - usually SSR.
The other thing in your favor is wanting 1 bedrooms which are often the last to fill.
I hadn't thought about that. We like the studio, but. . .yeah. The 1 bedrooms are really nice for napper/non-napper and the early riser vs night owl. (I, unfortunately, am predisposed to needing very little sleep.) If they tend to have more availablity, that is a thought! If we buy at SSR with enough points for a one bedroom at some of the more expensive resorts, it would come close to paying for itself, I would think. . .
Sep, except time at the very end of the month when Food & Wine starts, is the lowest
DVC demand time of the year. This year during Sep at 7 months out, including for the second and third weeks, you could get anything anywhere except AKV concierge, BLT standard view and GVs at BWV. AKV value was open (rare almost any other time of year), as were BWV standard and boardwalk views, BLT MK and lake views, anything at BCV and VWL, and GVs everywhere except BWV. Moreover, contrary to former belief before you could check on-line for availability, the same applied to all the time around Labor Day and thus that holiday is also a slow DVC time.
Be aware the opposite is true for early Dec. which is actually the highest DVC demand time of the year and 7 months out little was available anywhere except for SSR and OKW.
Thank you for this, drusba! This helps. All the rooms I would want were open at 7 months. (Okay AKV concierge would be tres kewl, but not in a bucket list kind of way or anything.)
Also, I guess the slow part of December would be out except for our home resort, which would be okay, even if we bought SSR, because it's not likely to happen often, if ever - it's just a wish. (Bad part of the work year for me.)
Now I have to plug numbers in for all the various DVCs and their maintenance fees with what's posted on the DIS in terms of fair market value and figure out our best bang for the buck.
Thank you all!!!!