Yeah, this looks like the best solution. At least for now, Google Reader only offers the "track this page" if it doesn't find a valid<link type="application/rss+xml" (or whatever) in the source code of that page.
So, if you have a blog anyway or any other RSS data stream, just add the <link> to that in the head of every page of your site.
Of course, eventually Google will just give users a different means of accessing this feature. :/