Great low-cost camping!
BLM Painted Rocks Petroglyphs Campground. 26 miles west from Gila Bend. Very large campground about a third of sites can be reserved online at recreation.gov. Sites are very cheap only $8 / $4 senior rate. However there is NO WATER and no RV dump. Cell service on Verizon and ATT are excellent, but TMobile is poor extended. Vault toilets, tables, fire rings and dumpsters. Bring firewood from Gila Bend at Chevron Station. Camp host onsite is very friendly and the petroglyphs site is walking distance. Ebikes are very useful in this campground as it is very large and spread out from the two vault toilets! Note that there is NOT a 14d limit to camp here, will let you figure it out. And UPS and FedEx will deliver and the camp host will keep your packages at their site for you to pick up.
Only 4 stars due to no potable water available or would have given 5 stars.