This seems to be the popular dispersed camping area along North Pump Station Road within the BLM Ironwood Forest National Monument. Numerous dispersed sites along a two track dirt road on both sides of the main gravel road. Free dispersed, 14D limit. No water, trash, toilets or designated spots. Cell signal is very good and OTA tv is also very good. Last mile or so from end of pavement is a wide graded dirt road accessing the dispersed sites from either direction, however the Silverbell road access seems to have a narrow bridge with a 6k weight limit?, So access to this site is from the south on gravel west El Tiro Rd for larger rigs?

(Note that State land is adjacent and also offers dispersed camping sites but an AZ state lands permit would be required on State lands.)

One negative issue is the constant target shooting from adjacent State lands.