VWL is one of the smallest DVC resorts. If you think you would want to stay there at any medium/high or peak times on a regular basis, then you should buy there. It would be VERY hard to book VWL anytime from mid Nov thru early Jan. unless you own at VWL.
If, on the other hand, you "might" want to stay there 1x in the summer in the next few years and can book at the 7 month mark, then your chances are excellent of getting it. But, you have to match expectations with reality. SSR and OKW eyer the largest DVCs and are generally easiest to book at under the 7 mth mark. AKV will have a lot of rooms. But it remains to be seen if it will be as easy as SSR and OKW to book. Because of its distant theming, it might not be as easy.
Many here say "buy where you want to stay" and I think that is pretty good advice, esp. if you have a strong preference, or can only travel a high/peak times.
I have found DVC to be very straight-forward in their presentation and in booking (you call 1st and get the room--total supply-demand). Good luck. Elaine