You can absolutely share a project like this outside an LMS. In fact, it's how I created the "Explore this project" preview linked to in the article. All you have to do is export your finished event guide for web, host it on a web server (which is a lot easier than it sounds), and then share the weblink to it with your attendees.
This article goes into more detail on the steps to do this—and even shares where to get free web hosting if you don't already have a server:
https://community.articulate.com/series/rise-360/articles/rise-360-share-a-course-with-learners#webA nice plus: once you have your web server all set, publishing a Rise 360 or Storyline course on it takes just a few minutes!