"It can also get crowded on major holidays. Memorial and Labor Day weekends are the worst. That's why we recommend making reservations well in advance if you want to stay in one of the 22 campsites with full hookups, picnic tables, and clean bathrooms with hot showers," says Frank. "Fortunately, many of our visitors are self-reliant, and they camp at the unimproved camping areas that border the dune complex."

In addition, the midday temperatures hover in the low 80s, ideal for the forays across the dunes. We also explored many of the trails along the periphery of the main dune complex, which wander through thick stands of pinions and magnificent ponderosa pines.

There are numerous four-wheel-drive trails and several hundred miles of ATV trails. These, and some civilized roads, lead to places like the pictographs at the bottom of South Fork Indian Canyon and the overlook at the top of the Harris Mountains, just north of Coral Pink. Exploring these trails can provide grandiose views of the dunes and Zion National Park.

If you're planning a trip there, making advance reservations at Coral Pink State Park is highly recommended. The unimproved campsites are filled on a first-come, first-served basis.

Also, bring plenty of supplies. The dune complex is a demanding environment, with no gas stations or stores closer than Kanab, which is a 22-mile drive from the park. Visitors to the area need to make sure fuel tanks are filled and food stocks and water are in abundant supply.

Safety in the dunes is also paramount. The dunes are closed to vehicles from 10 p.m. to 9 a.m. Once you're on the dunes, orange flags on whips are required on all vehicles. Helmets are also required on all OHV riders under the age of 18.