I called MS about a month-6 weeks ago for availability in Oct. because our dates were flexable. Here is what was found out about 2 BR:
week 1 - BCV & BWV very good
week 2- BCV very good, BWV low
week 3 - BCV low, BWV very low, but not sold out.
We did get BCV for week 1 with no problems.
So that is my oldish info on 2 BR's - I know, not super helpful, but the best I could do