I am going on the Keystone from Elizabethtown to Philadelphia on Train 600 in May (on a Friday). My parents are going on the following day (Saturday) on 660 from/to the same stations. I understand they are running busses between Lancaster and Harrisburg between April and November due to a track project. From what I read, we SHOULD be okay going to Philadelphia. Coming back to Elizabethtown will be a different story. We will be coming back on a Tuesday in later May on Train 645. What do we need to know about this? What kind of buses do they use? We will have suitcases.