The Dugway Geode beds are on public land with some private quarries. You can hunt for geodes on the public land or pay a small fee per group ($30-100, depending on your take) to one of the private quarries who help you out by uncovering the veins of geodes below the surface.
We visited on a day that one of the companies was making their weekly dig to retrieve geodes for their rock shop. We had a nice talk with the proprietor. Only a few years ago, anyone could just walk in and dig around their quarry. Unfortunately, a series of acts of vandalism and other problems has forced the owners to carry insurance which now requires the public to pay a fee to dig in their private quarry.
I've read elsewhere that some of the geodes glow when in black light. Very cool!
Further information from the Utah Geological Survey office here
Utah is a state located in the westcentral region of the United States of America. Utah is the 13th largest state by area, ranks 34th by population and 10th by population density of the 50 United States. Utah was the 45th state to be admitted into the Union, on January 4, 1896. Utah is landlocked, being bordered by the states of Idaho to the north, Wyoming to the northeast, Nevada on the west, Colorado on the east and Arizona to the south. Utah is very mountainous and is a popular outing destination of the outdoorsman. The state population is about 2.82M with 95% being Caucasian, 2.4% Asian, 1.7% Native American and 1.3% Black. The state capital and largest city is Salt Lake City.Source: wikipedia