Hi Colsmith,
You don't need to be able to see the pole to polar align.
As you say, just align as well as you can with a compass, protractor and spirit level, then star drift align as explained in this thread.
I assume the three star alignment you mention is for a telescope computer system. That three star alignment will probably allow you to find objects, even when your mount is not polar aligned. However, to then track that or any other object your mount needs to be polar aligned.
Regards
Trevor
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