Several of you who read the blog enjoy Living History. This group Association for Living History, Farm and Agricultural Museums (ALHFAM) is group you may want to explore. They have a regional group here in the west.
Their mission statement The Association for Living History, Farm and Agricultural Museums (ALHFAM) shares practical knowledge and skills among those who make history relevant to contemporary lives. We draw strength from our diverse network of members, sharing experience, research and passion for participatory learning.
I have not yet had to opportunity to attend a conference but look forward to doing so. Their Profession Interest Groups (PIGs) that peaked my interest of course is, FPIPN (pronounce it "pippin") First Person Interpreters Professional Network. Go look at their site and poke around, they even have some job listings.