As to January you should have no problem getting anything 11 months out by calling 11 months before expected date of departure from WDW. As to different point costs and maintenance fees for BWV and OKW, the main reasons are possibly the following:
1. Point Cost: Essentially all of OKW was built 3 to 5 years before BWV. Point costs bear a relationship to construction costs.The developer, who paid the construction costs, gets its investment back and profit mainly from selling at a higher number than its costs of construction; it can reach that goal by selling more total points or raising the price per point or doing a combination of both (Disney tends to do both). That time lag between the resorts' construction periods means the cost of construction per sq. ft. for BWV was higher than OKW. Also, BWV has the better location in the center of the Epcot area justifying a higher per night point cost. Finally, to a significant extent with OKW, Disney was going out on a limb--its first entry into the timeshare business which at the time was considered a business full of many cheats. It certainly did not want to set up a point system that would appear in any way too high at the time, and once set the point totals cannot be changed for that particular resort. Point totals like at BWV is probably more where Disney (at least in hindsight) would have like to have had OKW. However, the combination it picked at the time OKW opened -- large rooms with reasonable point levels at a reasonable price ($51 with an introductory price even below that)--was obviously correct as it succeeded and led to where the program is now. You should also note that OKW is "significantly lower" only when you compare it to BWV preferred view; BWV standard view is very close to the same point costs as OKW.
2. Dues: the difference in dues reflects a difference in the costs of operating the resorts. BWV is a hotel like resort that has valet service, bell services, room service, a pool that requires lifeguards and has higher maintenance costs, more boats, and other things that add both additional equipment and additional employees (and employee costs are well in excess of 50% of a resort's costs and your dues). Thus the difference between the two reflects the difference in operating costs per member.
