Geoff, i have a pretty good view of the SCP but unfortunately its right over a main road so lot of light pollution in that direction. I have for some time pondered on the idea of using a Camera attached to one of these polar scopes. Recently I saw myastroshop have released something like this. Using the GSTAR-ex camera with a custom made polar scope mounting rig. You can find it a third of the way down on this page
http://www.myastroshop.com.au/guides/gstar/index.htm
Its called the GSTAR-EX Polar E-Z system.
I would prefer to use something like a Qhy5 or similar guide camera to do the same. The qhy5 mono i have is quiet sensitive, and I think would work. Just not sure how to adapt it to this. I know now there is a Video Finderscope you can get that uses the Qhy5 guider, so I think its possible to do. Just need to work out how you would adapt a Polar scope to this.