For now, you would have to record the output of your iPad into the Aeros for this to work, you can record up to 10 min stereo before saving and after saving you will recover some time (see Dynamic Read).
You may have timing issues given that Session Band is not sending Start/Stop commands to the Aeros. Furthermore, if you intend to be able to record both to a click they must be somehow synced together by MIDI. I believe it is possible but you may run into issues in practice with this method.
The same reason you can’t quantize BB and session band is the same reason you can’t do Aeros and session band and then BB and Aeros with the same files.
The Aeros still cannot convert files recorded in freeform mode into quantized tracks (Autoquantize), and can’t be Master. Both these features will also improve your odds of a good outcome here and are coming soon.
Additionally, we will have a backing track import/export system that makes this completely unnecessary.
In essences this is possible but if you want to synchronize a device with the Aeros after you record into it, that is different than just recording a backing track into one part or across parts.
Stay tuned!