I'm on the Nov 7 BMQ in St Jean, and from what I've found from talking to others, you'll either be on serial 0226 or 0227 (There could be more, however those are the only ones I know of for certain).
You should get your course number and additional information in the paperwork they give you, which contains joining instructions, a personal kit list, and another security form to fill out (hurrah!).
So in short, if you haven't gotten your info package yet, hold tight and your serial number will be in there. If you have got your info package and the information wasn't in there, perhaps a call to the CFRC is in order, or wait until your swearing in where you'll be given more info.
Congrats, see you in St Jean.