Hi, We'll be first-timer visitors to Philadelphia during the last week of June. Tentatively, I'd like to follow Tripadvisor's 3 days in Philadelphia suggestion. That will give us 1 day for day trip, I'm considering Gettysburg, Lancaster, and the Amish area. Does Gettysburg need 1 day or we can combine these 3 in 1 day. We will just rent a car for 1 day trip. Any suggestions you could give me would be much appreciated. Thanks so much.