Keeping the code of a Wordpress site up-to-date is not generally hard.
However, in this case, and even more relevant given your query, I must ask:
why use wordpress? This seems a static set of pages, so it could be stored
as .html pages without the overhead of running wordpress... or the security
issues that might happen if that was abused. No code = no security issues.*
This could be developed as html pages (you are probably using raw html
markup already), or if you fancy preparing that in wordpress, you could
have a wordpress for editing the tutorial, and then have a process that
statified its content before publishing on toolforge.
* Or almost. I'm glossing over potential vulnerabilities on the web server,
the web application means the system hundreds of times safer.