What is the focal length of the longest lens you intend to shoot with on this setup? Generally speaking, because image scale when using mounts like this is usually pretty large, if you can get a moderately accurate alignment on the pole it should be good enough that drift caused be alignment error won't be an issue. As you get longer focal lengths, the periodic error of the mount will be a bigger issue.
For example, if you simply pointed the mount directly at polaris, which gets you around 45 arc-minutes of error, and you were imaging an object at 45 degrees DEC, the drift induced by your alignment error over the course of a 5 minute image would be about 42 arc-seconds. If you were shooting with a 70mm lens, using a APS-C sensor equipped DSLR, that equates to about 4 pixels of shift in the image. That's not a lot, and that's without even trying to get a good alignment.
So, if you do even a half baked job using the PA scope on the mount, odds are that for most wide field camera lenses you'll be fine.