Four or five years ago, I spent 5 nights at
New River Junction in Blacksburg, VA. while working in the Blackburg/Christianburg area. I had a nice grassy site w/W&E on the banks of the New River. Fishing & tubing is the draw. While the park's main focus is catering to the local "tubers", it has about 16 RV sites. The showers are dated, but adequate. IIRC, the dump station is right next to the main building... a weird setup, but worked for me.
There are a lot of trains in the vicinity of the park. Sleep came hard the first night until I became accustomed to the noise. I seldom heard them the remaining 4 nights. The owners were very nice. I wouldn't hesitate to return. They are affiliated with Passport America.
On edit: They do allow dogs but they have to remain on a leash and be well behaved.
RVn Full-time