Ruby Road, from Arivaca, is very potholed on the asphalt……go slowly. The dirt is nicely compacted and mostly flat, with rocks, of course, and easily drivable by city cars. There are occasional ruts of about 2″ and jolting, but I would take the Camry there in a minute. The places where the stream crosses multiple times are “no worries, mate”. They are rock on bottom and if you aren’t worried about getting your tires wet, you will have no worries. Try not to drive widely around them, it only messes up mother nature.