Is this specifically for car camping or do they have disperse camping available? Looking for a place to camp that does not require you to be in the campground.

Yes, they have backcountry camping but I believe you have register and they'll specify the exact areas you can and can't do this.

Not true backcountry camping

You can camp in any way that you would like, but I believe you do still have to pay for a site.

Not sure what disperse camping is but you can leave and not have to stay there