You mentioned Hershey.Hershey park is a good one day trip if you like rides or entertainment.You are not too far from Gettysburg,another good one day trip.If you haven't been to the Lancaster area,you might enjoy a drive over there.Make sure you hit Shady Maple for breakfast.Strausburg,near Lancaster also has the state train musuem and you can ride on the Strausburg railroad.These are all in the same general area.Don't know what kind of campgrounds you like,but we have some very nice state parks in Pa.Most have electric hookups,water hydrants in each loop,dump stations,showers,beaches or pools.Two in those areas would be Pine Grove Furnace and Gifford Pinchot.