There are two camp grounds at the Grand Canyon.Mather Campground is primitive sites. Hookups for trailers are available at Trailer Village which is located next to Mather Campground. Trailer sites are $18 per night for two people, with an additional charge of $1.75 for each extra person. Campers may register at the entrance to Trailer Village. Office hours: 8 a.m. - 5 p.m. For reservations call 303-297-2757. I believe Trailer Village is also operated by the National Park Service or its contractor. There are additional private campgrounds available in the area.