Look at google maps and you can see some of the sites https://www.google.com/maps/search/Red Canyon Campground/@37.7435401,-112.3120369,743m/data=!3m1!1e3?entry=ttu On the west side loop, I see at least one pull thru. You can also right-click on map and do a measurement.

Sites were not too hard to back into. It’s been a few years since we were there, but I do remember we couldn’t be choosy about our site. Arrived on a Sunday afternoon and only about 2 sites left.They were all nice, except for the one that had the view of the dump station!

There are pull-thru sites. But I recall this is a first-come first-serve campground, so may not mean one will be available when you arrive. Towing a long fifth wheel might be a challenge, as the entrance is a huge u-shaped dip in pavement, likely for channeling water when it rains. Well worth a visit as it's a true gem of a campground.

We were in a pull through. I do not remember the number but it was near the camp host and to the right of the entrance. We were in a 33' MH towing a car.