It is possible that Mr Steves can be in one place while someone else from his team updates his blog from a different location. It’s also possible that he can visit multiple locations in the same day. There’s even a chance he avoids party crashers and other unwanted guests by doing the tour and having someone post the blog entries a few days later from the proper route locations.
Even easier than that, as a professional digital journalist, he almost certainly uses a tool like HootSuite or one of its many competitors to queue up his writings. Once his editor, proofreader, or social media manager has had a look at them and they've made any corrections or changes, he or someone else pushes a button to schedule the postings to appear on all his social media channels at once with the proper links to each other. The Facebook post is geotagged when it's created, but it doesn't appear in his feed until the scheduled time. It's been 5 years since I worked in a digital agency and that's how our social media team did things back then, so I can only imagine it's even simpler nowadays.