It might be a bit of a trek from Iowa to Atlanta, but I would definitely visit
the Puppeteers of America National Convention. It's going to be a great festival with lots of workshops from some of the best professional puppeteers.
There is a DVD available of the last national festival, "Puppet Rampage" that you can order online for $20 if you want to get a feel for what the festival is like.
There is also
the O'Neill Puppetry Conference and
PuppetFest MidWest, which both offer intensive, fairly serious puppetry training.