Playa, I ate a few times in the restauarnt La Caverna when I was little. It burned years ago and was never reopened. My uncle was commander of the port in the 60's and I spent alot time in Nogales.
Nogales Sonora is really pretty once you get out of the downtown district. In 2006 we stayed a couple of days with some friends in Villa Sonora a part of Nogales. I took my bass boat from there we went to Lake Novillo east of Hermosillo to fish for bass and then decided to take the historic Ruta Rio Sonora back to the states, we stopped in Aconchi and went into the catholic church, they still have the statue of Jesus placed there in the 1600's and he is a black man. If you are interested in Mexican history read about the Ruta Rio Sonora.
The towns, Arizpe and Naco were the 2 worst towns of the trip. I sensed if you went looking for trouble in those towns it wouldn't take long to find it. Even back then there was army everywhere around Aconchi.
I will always treasure the days of the La Caverna era, I remember one vendor that I met one day selling his sarapes and tequila. He invited us into his store and we gladly went in, offered us a free shot of tequila. His name was Micky and his tiendas name was Micky's. He was a very nice person to us. Well nogales turned into a sour town and everyone got up and left, now its run from Sinaloa. I also had a great time in Agua Prieta, going to The copa, Santa Fee , Pelicos, Silver Dollar, Chapos, Man that was the time of my life...