Lava point is pretty deep into the park, so it takes a little while to get here from the south entrance. It's a very tiny camping area, with like five or so sites. Also, I think its only open during the on season and closes around the fall time.

While you're in Zion, you gotta check out some awesome trails. Angel's landing is a great hike. Don't do it if you're afraid of heights though, because there are some pretty sketchy spots. Also check out The Narrows. You're walking through water the whole way, so make sure you get some good socks and shoes. Also check out the museum in the park.