I have done as mentioned above: If pull through site unhook in the site (if at all when just overnight).
I'm only commenting because I've had more than one campground mention where to unhook upon checkin even though I didn't even ask.
One mention was "You might want to unhook where you're parked because the turn to get in the site is rather sharp"--it was a pull-through site. I did hook back up in the site before leaving, however.
The site in question:
(Yeah we use a dolly but I don't think the "how you tow a car" is really that relevant to the question at hand.)