The annual ANTIETAM LUMINARIES is scheduled for the first weekend in December.
http://www.nps.gov/anti/planyourvisit/luminary.htm
If you have never been there it is an experience beyond words. 23,000 Luminaries are placed in the battlefield - and my sons BSA troop is invited back again this year to layout one of the fields.
We go up the night before and camp at the ag center. So hope to see you there.
Bill