I booked two rooms with my points at the Grand Californian for Oct 08 stay (Thurs to Sat) in January and had no problem. There were no concierge rooms at the time. Although in the past, GCH has been usually slow this time of year, it has not been the case last year. DL is developing their own Halloween Trick or Treating Event. In the past Disney has offered to sell the tickets to APs first (usually in June) I would image that some of the APs will book a room right after they buy their tickets (We do). That has effected the booking availability for the Grand Californian in Oct. For other times of the year, The GCH is getting harder to book the closer to your travel times. We go to this hotel twice a year (we just can't wait for GCV to open) and each time, I try to book a room(s) at least 4 months in advance, so I have more choices. About half the time we book a one or two bedroom suite. Those are even harder to book. You wouldn't think so with the cost, but there are not many to begin with. Most of my experience was without the use of my points (We just bought at SSR) I heard that GCH is booked at 90% capacity most weekends. Anyway that is what I know. Hope that helps.