@electricarchaeo almost got it working before class, then worked on it with students in class so they could understand hoops. They got to see me Googling for holoviews help (#SausageMaking). After a few dead-ends, here's the result:

https://github.com/sfsheath/holoviews-in-folium

Direct link to clickable map:

http://sebastianheath.com/holoviews-in-folium/embedded_iframe.html

#holoviews #folium

As noted earlier in thread, now up to them to make it useful. And do tell if there's a better way...