Oh My!!! Start at the visitor center. Get a feel for the battlefield. Also go to see the electric map, it gives you a good idea of how the battle progressed. You can take tours or get the self guided tour using a CD. Then you can get out and explore as you want. If the weather is nice (hard in winter) lots of bike riding opportunities through the park. You are also close to the Maryland line and there are lots of things to see there. Lots of shops. Also you are not that far from Lancaster you can take a day trip there. We used to go several times a year and always found and learned something new. You can also do a horseback ride through the battlefield. I can go on and on. It is a great place. Have fun.