I prefer to split out tracks in Sonar also. Separate tracks for kick,snare toms, cymbals, overheads, room.
I like to see the entire mix at a glance. It's also nice to be able to quickly adjust the amount of room ambiance on the drums once the whole mix is up.
I'll sometimes use both the processing inside of BFD and my Sonar/third party plugins. Why have a ridiculous amount of control when you can have a ludicrous amount of control
I never bounce to audio until I'm exporting the entire track.