Well it's not quite on Halloween and it's not a convention, but I don't see a forum for posting gamedays.
Halloween Party!!!
As we approach the annual night of haunts, the Central New Jersey Gaming Group invites you to have an early Halloween at our regular gaming night! Our judges have written modules filled with tricks and treats, just waiting for a would-be hero to come knocking. Your party is invited to our party! Come quest the night away!
We WILL be playing D&D, and they will be legal using the Living Forgotten Realms "My Realms" system. Snack on some Halloween candy, roll some dice and have a laugh at custom modules written by our local judges. All are welcome to attend- it's a great way to meet new people and learn to play Dungeons and Dragons.
Admission is $3, and comes with some complimentary Halloween candy. HOWEVER, if you wear a costume, admission is free! (And no cheaping out on the costume, like being a "pedestrian"- your DM will literally be the judge of whether or not you are admitted for free 
Event address and driving/parking directions can be found on our meetup page, www.meetup.com/njgamers/calendar/1157008...
Please also register there, or if you are just passing through, drop me an email so I can reserve you as a guest.
Adventure Descriptions:
NJGG1-1,2,3: A Deep Shade of Purple
A new cult has established itself on the border of the Cormanthyr Forest, known by locals as the "Purple Flame". The cult has been terrorizing the towns near the forest border with abominations of nature and undeath. Will you journey into the forest and destroy this new threat? A Living Forgotten "My Realms" adventure for characters of levels 1-10.
Thanks all, and Good Gaming!
-Jeremy Jordan
Central NJ Gaming Group
www.meetup.com/njgamers/