I don't work with iron myself, but coming weekend (March 30 & 31) I'll be at the Hunebedcentrum, Borger (the Netherlands) and there will be a blacksmith too, working in the way it was (probably) done in the Iron Age.
Hunebedcentrum is a museum about prehistory in the Netherlands, including some replicas of Stone Age, Bronze Age and Iron Age houses and workspaces. So, if you happen to be in the Netherlands ...
Hunebedcentrum