This is one five of 14 Day LVTA camping areas in the Quartzsite vicinity. 

It was a very large site that had entrances on both sides of the road that each had their own host. Lots of flat open spaces. It is managed by the Bureau of Land Management(BLM). BLM lands have special rules, fees( sometimes none) and can be popular with boon-docking.. I have seen other reviews saying it was free to stay here, but there are signs that say LTVA permits are required for use between September 15th and April 15th. Seasonal fee is $180.00 and 14 day permits were $40.00

I only had a look around, and decide to move on looking for actual free locations.