While it's the smallest of the campgrounds in Shenandoah National Park, Lewis Mountain is by far my favorite.  I have camped there more than 50 times over the years.

It's got it all:

• Sites that are suitable for tents, trailers, or RVs (only 30 sites, so you don't feel like it's crowded even it's full)
• Cabins if you don't want to camp
• A campstore with the basic necessities in case you forget something
• Showers and laundry (bring quarters!)
• Ranger programs (when funding permits)
• Convenient access to the Appalachian trail
• Close access (~15 minutes) to the Swift Run Gap (US 33) entrance to the park

It's also about a 15-minute drive from Big Meadows, which has more amenities (bigger campstore, gift shop, restaurants, and visitor center).

I highly recommend a trip there.

Lewis Mountain does not accept reservations, so be sure to get there early. At $15 a night, it's pretty reasonably priced.