The Northeast Poultry Congress, the largest show in the northeast is January 17-18 in West Springfield, MA. People from all over the country attend this show and several thousand birds are shown. I'd highly recommend going. If you're looking to enter, there's still time. The entry form is on the site (
http://www.poultrycongress.com).
Here's a thread on the show..
https://www.backyardchickens.com/forum/viewtopic.php?id=103455
Here's a list I put together of last year's fall shows in New England (many of these also hold spring shows):
Eastern NY State Poultry Association (NY) - Sept 28
Central Maine Bird Fanciers Fall Show (ME) - Oct 5
Little Rhody Poultry Fanciers Fall Show (RI) - Oct 25
NH Poultry Fanciers (NH) - Oct 12
Yankee Fall Classic (NY) - Oct 18-19
Boston Poultry Exposition (North Oxford, MA) - Nov 2
Northeastern Poultry Congress (West Springfield, MA) - Jan 17-18, 2009
Bantam breeds are more popular for showing than LF breeds.