We just hosted a Book Fair with http://www.bestbookfairs.com/.  The owner, Chris Gonsalves was great to work with.  The book selection was very high quality yet easy to set up and break down.   Although he is based in Massachusetts, he was very responsive to our needs and provided the new Nutmeg books we requested.  Here is his contact information:

Chris Gonsalves

Best Book Fairs, LLC

781-491-0044