The one concern I have is finding somewhere to leave the car for a week. I will definitely be adding this trip to my blog.
i you want to leave it in Geneva, it's easy the dealer in there can help you.
I have do this road last summer and i will do again this summer if you need the KML file let me know.
the best best is go to the swiss alps and then go down by the best italian pass to venice the scenery is incredible.