Joaquin Miller began this century with a bit of a revival. There has been a conference each decade:

https://www.skypilotclub.com/jmconference.html 2005 at Southern Oregon University

2013 at Mount Shasta Sisson Museum

https://www.latimes.com/archives/la-xpm-2004-oct-19-os-wildwest19-story.html - description of 2004 conference