Stopping at Smith Mountain lake was well worth it during my mini road trip through VA. Pros: huge lake with tons of outdoor activities (trails for running/walking, boating activities, kayaking). There is a cool brewery nearby (Sunken City Brewery). I Cons: It's super popular, so you'll see a ton of people. Depending on where you are it may feel too crowded.

Overall, I enjoyed kayaking, relaxing and visiting the brewery. It wasn't the most backcountry or stereotypical wilderness experience, but if you don't mind that, go visit!