There are multiple entrances along Old Ajo and S San Joaquin. The best we found has 2 large dips. Some have quite a few more or really deep ones. If coming in with a lower ground clearance vehicle, or a longer one that may bottom out you might want to scout them out first. Once inside the camping area there are lots of spots to choose from. The smaller and more nimble the vehicle gives more choices. There is a mix of local transients, that sleep in tents and small RVs as well as travelers. These sites offer a good amount of privacy from the hwy and roads but depending on the site within there may not be much privacy. Further east on Old Ajo just east of S Camino Verde is another site that travelers with larger rigs seen to prefer. However, there isn't much privacy at all from neighbors, hwy 86 or Old Ajo. Access is flatter though. No water, electricity, or dump. For $15 you can dump and fill at right on San Joaquin at Justin's RV park or there are free options in town (20 minute drive). Signs day 14 day stay. It doesn't appear to be currently enforced but a BLM official does drive through occasionally. We didn't see him stop to speak to any campers.