If you decide to use BIAB to reinforce your performances, I personally would and in fact do, I would recommend once you have the set of songs completed, drop it into your phone or a CD and play the hell out of it.
I loaded my phone with my music and played it through my car stereo every time I was driving (alone) until I knew the music and my vocal parts backward and forward. If you and your other band member both do this, your rehearsal time will be productive and performances will be able to withstand annoying distractions.