Apparently this has an RV park. Even a pool. I know most use Edgar & Anna's, but this place is 1 km east of hwy 15 D about 6 km south of Santa Ana.
If you go to google earth you can see it. I think the RV park is the circular area below the buildings.
N 30.515706
W -111.087708
Apparently it is a Christian facility with rules against alcohol which is a bummer. May check it out on my way down next year.
Turn off from hwy 15 D is between Km 163 & 164 at
-111.105353 W and 30.51384 N