andyc, 
My never ending research into orgroam is still ongoing.
But the need, not just for #emacs everywhere, but #orgmode everywhere posed the obvious question - why use Markdown for your Hugo blog?
Turns out #Hugo supports native orgmode posts which can coexist with the existing Markdown content.
A test post confirmed this but only after I had to upgrade the Papermod theme and tweak the Netlify configuration for the latest Hugo version.