Coming from a state were no camp fire laws exist I like fire pan law a lot and enjoy traveling Anza Borrego. Almost every time Im in Anza Borrego I see LEO checking and looking for pans.
For AZ the most popular camp fire material is pallets mainly because they are easy to get, dont need a ring, and they are everywhere. Within a short time most of the evidence of a fire is gone EXPECT for the all the nails and staples used in the manufacturing of pallets. Nails and staples are hard to see and result in many flats.
For the record if you travel with me rarely do I ever have a fire anywhere.