You can't come to Central PA without visiting Hershey Park at least once! With weather permitting, the amusement park is open during weekends in October. Check their website for Hershey Halloween events which usually run September - November. If rollercoasters aren't your thing, there's still plenty to do in the town of Hershey!
Tucquan Glen is a beautiful hiking trail with swimming holes! Please note that the trails are not paved.