Do you have to be 21 to get a camping spot?

No

Just call them, I have found them to be super friendly. The best, bar none and as has been mentioned, a Gr8 bridge view. Nightly campfire.

No u dont nice place to camp

I would assume you would have to be at least 18, but of course, the campground host would be able to tell you that definitively. I can tell you, the campground affords an excellent view of the bridge.