Barry, good point. I have a fish tape the I use to pull/push wire through wall cavities. I also find it is useful for digging roots out of a sewer pipe, not a good as a real "roto-rooter" but it works, especially on a holiday weekend when plumbers want double time. (Don't blame them, they also need time off.)
I had thought to tie-wrap the scope to the fish and use the fish tape to push the camera along.
Thanks,
Jim