After contemplating that ladder, I think I overshot. 12 foot may be too much but I do have some high sections. I'm getting most of it done with a step ladder but my main foyer may warrant it. I will be in touch on that.
In other news, the residual wall paper is coming off well. The left is when I sprayed it with a weed sprayer filled with a mix of water and baking soda, letting it sit, then taking it off with a 10" trowel
http://www.columbusracing.com/forums/picture.php?albumid=421&pictureid=5998