Here a ya go:
http://www.mepacon.com/
(There has also been another con in that location, BETACON, but I gather it is not being held this year. Maybe next year it will be back. However they never turned updated the website to say so - still counting down to 2 days left but no details on the site.)
Also check that Meetup Group in my previous post;
they are the North Eastern Pennsylvania Dungeons & Dragons Meetup
http://www.meetup.com/NEPA-Dungeons-Dragons/