We are going from Pittsburgh to Ocean City Md in June and I'm trying to find some information to help me decide whether or not to stop at Arlington Cemetery. We are a laid back family of 5 so 1st of all is this a stressful way to begin a vacation! I've heard crazy stories about the beltway. In general can we park at the cemetery and just walk through in a few hours or should this be a separate trip? How busy the last week of June? Is there anything else close by that we should also see? Thank You!