If readers are gonna access the links in question they’ll already be online so you can simply put up a web version of the documents with inline hyperlinks, or put up an online appendix with a categorized list of links. I’d much rather have e-versions of this kinda of thing to give me less to carry around. If you need to measure the effectiveness of a print campaign you can edit the robots.txt to keep it from being indexed, but word would get out anyway, but hits is hits and one way or another the origin of those hits would have been the printed matters.

I’d avoid shorteners and aliases.

The other thing I would do is not bother with hardcopies at all 🙂 Dude, Hardcopy???