Consider also a motion detecting cam-corder in the garage.. Likely won't get much but your coming and goings and the time stamp may in some cases be ..er.. embarassing... but if the new tow bar goes walk about it may also show the face attached to the legs...
True story: Photographer's house was broken into. nothing taken but she noticed a camera that had been "Shutter cocked" (Ready to "Shoot" a photo) was not shutter tripped (Photo shot) so she developed the film and when officers came to take the report handed the photo (Full face shot) to them. They went out and took matching profile and 3/4 profile shots at the station.