Yes, But Allatoona Landing has a gate code, so you can come & go as you pleasse. Also there is parking outside the gate, so even if you did get locked out you can still come & go.
Almost all the corp campgrounds are remote & have no parking outside the gate. you could find your car towed by morning
If you do find yourself in a corp campground, don't worry, everything is close enough, someone will be willing to come get you.
Knowing where the other ramps are is a great Idea! It will make access much easier.
This weekend, I'll also make arrangements with some area hotels/motels
for the non camping sector