Just put a hard cover on my Ural sidecar
So now the GF can only be on the back of the bike.. It really is not to bad, just remember to lean!!! also having a passenger on the bike that will lean into the cnrs helps a lot.
One work of caution thou, the GF may not like the sensation of being on the back. Apparently the lateral forces of cornering, even small corrections can be very odd on the back.
I would say go for it... Just start off careful, or find an empty parking lot and practice with her on the back. I I did just this when teaching my GF to lean and not freakout when flying the chair... To be on the safe side, leave the dog at home until you are both in the groove ;-)