I haven't yet used it, as I'm so new my only camping experience was a 3 day "shakedown cruise" at a local campsite, but I'm planning to take along my wireless containment system. Living in Maine on 5 acres of wooded, and sloping granite ledge, a physical fence has never been an option for us. So my dogs have been trained to an underground (actually wired above ground) fence. I started with a wireless, then went to a physical, but I have the wireless yet. It can be set from 5 feet to 90 feet, so depending on the campground layout, that will keep my dog contained and on our campsite while we are outside enjoying the campfire.
I checked with a couple of campground owners, and they all said it's acceptable. And no, my dog does not break the barrier. Some dogs would (although it's a matter of training) and may not be for everyone. It won't work for little dogs (collar and receiver size), and should never be used on puppies under 6 months.
It may be an option for those with a larger dog, without a strong prey drive. I have a Lab, by the way.