score:2
In addition to jpatokal's excellent answer on using MediaWiki's built-in PDF conversion feature, I have a couple of more tips:
Personally, I use a combination of printing out individuals chapters of guides, my Kindle reader, and offline notebooks on Evernote when travelling (I generally use Evernote a lot, so YMMV if you're not used to using note taking apps.)
Upvote:3
Like all Mediawiki Foundation wikis (Wikipedia etc), you can "collect" pages on Wikivoyage and turn them into PDFs that can then be professionally printed:
https://en.wikivoyage.org/wiki/Special:Book
Obviously this is limited to Wikivoyage and Wikipedia, but that's still a pretty good start. See the company behind it, PediaPress, for more info including video tutorials.