FYI....Here's what I currently see right now for March & April.
As of today I can book my arrival as far out as April 22, 2013 at any non-home resort.
The Villas at Disney's Grand Californian Hotel & Spa
Studio (sleeps 4)
Wed 3/6 - Sat 3/9, Mon 3/11, Tues 3/19, Wed 3/20, Tues 3/26, Sat 4/6, Sun 4/7, Sun 4/14, Wed 4/17, Fri 4/19 - Sun 4/21
One Bedroom (sleeps 5)
Fri 3/1 - Sun 3/10, Wed 3/13, Thurs 3/14 - Sat 3/23, Fri 3/29 - Mon 4/1, Wed 4/3 - Tues 4/9, Fri 4/12 - Sun 4/21
Two Bedroom Villa (lockoff sleeps 9)
Wed 3/6 - Sat 3/9, Tues 3/19, Wed 3/20, Sat 4/6, Sun 4/7, Tue 4/9, Sun 4/14, Wed 4/17, Fri 4/19 - Sun 4/21
Two Bedroom Villa - (dedicated sleeps 9)
Fri 3/1 - Sat 3/23, Wed 3/27 - Sun 4/21
Three Bedroom Grand Villa (sleeps 12)
Fri 3/1, Sat 3/2, Thurs 3/7 - Sat 3/9, Mon 3/18 - Fri 4/11, Sat 4/13 - Sun 4/21
Just like in Jan & Feb the dedicated two bedrooms and Grand Villas have more availablility and the smaller units are being booked first since they require the least amount of points.
NOTE: Easter falls on March 31 in 2013. However the OP stated that he doesn't like Disney during peak times
Honestly, I find it hard to believe that Aulani is hard to book at 7 months out. Yes, perhaps like WDW certain size units and views might be harder to book at the 7 months but not completely shut out for all size units.