It appears Asprinkles couldn't get an answer because most people don't know where Puerto Lobos is or how to get there from Rocky Point, and Jerry has suddenly gone MIA.
The old way was through Caborca and then 28 miles of dirt road to Lobos. But around 2010 (?) the highway past the Mayan Palace was extended all the way down past Santo Tomas and Puerto Lobos to Libertad and beyond. Since then, that's been the way to go to Lobos for people coming from Phoenix. From Tucson the trip through Nogales to Santa Anna through Altar and Caborca takes about the same amount of time, but we prefer going Lukeville to Rocky Point to Lobos for various reasons.
People going from Phoenix to Lobos via Caborca are adding about two additional hours to their drive, so they'd like to avoid that if possible. But it sounds like that's what the answer would have been if he'd been given answer.
Nevertheless, I was disappointed that the forum didn't come through on this one because it's the kind of thing the forum is usually good for. I guess I didn't realize what a small and poorly understood niche us Lobos enthusiasts occupy in the Rocky Point world.