Leaving a tow dolly outside the campground

I am gravitating toward getting a 21-23 foot class C and towing my Mazda on a dolly. As in my contemplated full-time adventures, I am going to be camping in national and state parks, I anticipate that I'll encounter many campsites that are incompatible with the combined length of my contemplated setup as well as the inability to back up. So I may have to drop the dolly+toad outside, take the rig into the campground, get set up, retrieve the car--but what about the dolly? Solutions seem to be confined to a) wheel the thing back to my campsite by hand--difficult at best, often impossible b) just leave it there c) just leave it there, but chain it to a tree or something.

If anyone deals with this issue on a regular basis, I'd like to know how comfortable you might feel with leaving the dolly outside or on the fringes of the campground; also, how tolerant are authorities/campground owners of dollies being left alone?

The pain-in-the-ass factor of various solutions isn't relevant--I just want to know if lone tow dollies tend to survive their loneliness. I've noticed, in national park campgrounds, that nobody even tries to bring in a toad on a dolly, because very few of the sites there are pull-through, even if the length isn't an issue. I would expect the busier campgrounds to forbid you to drop your toad outside, but if you don't ask, you can never be told "no"...