We stayed at BLT last year and LOVED it! We stayed in a 2 bedroom (myself, DW, DS x 3, FIL and MIL for total of 7 people). There was plenty of space and the room itself was fantastic. Of course the main reason my wife and I loved it was location, location, location! (the boys favorite part was the pool).
May 2013 is more than 7 months out so I would think you could rent points from someone here on the boards. This will be FAR cheaper than booking through Disney. The only disadvantage is lack of flexibility if you need to cancel. We rented points and stayed for literally half the price.
Hope this helps!
Paul