My yearly experience at Cacapon State Park was just completed. It is my tradition to arrive in Berkeley Springs mid morning on a Friday, drive directly to the park and hike the Ridge Trail which is a lovely trail which winds upward amongst rock outcroppings then down along the stream. It is peaceful and meditative.
There is also a lovely beach area as well as tennis and fishing. Althought I've not stayed at the park, there are accomodations available. It is a very clean, well kept area with lots of picnic tables and trees.