been thinking about and longing for historical reenactment more so than unusual. Here's some groups in England and one in France I'm totally fangirling. Britannia
which covers the time period of Riodan's story, been a big fan of theirs for years. en.ordalies.com/, a group based in France specializing in Germanic fighter against Huns in the fifth century...
(Also Riodan's time period) and comitatus.net/index.html... who are set a couple of generations before Riodan's time. I've been a big fan of their work for years now too.