I didn't see a post about this on the DVC Board yet, so I'll give you a little info, even though I haven't stayed at the GV at the BWV.
There are only 6 GVs at BWV and usually DVC members fill them at the first opportunity. If you go at a slow time of year, or *possibly* book more than a year in advance you may be able to reserve one.
But they are spendy if you pay cash thru CRO.