We, also couldn't find any info about Nogales and finally decided to try Lukeville, AZ instead.
Well, as far as I'm concerned, I will be using it in and out for future trips SOB.
The lanes there are a bit tricky, as you have to make wide turns and all while crossing small "topes" placed at angles, but all 3 of our rigs went thru without any problems. A 27' Class A without a tow, a 40' 5wheel with a duel cab pickup, and my 38' Class A with a tow.
Also, its nice to have Organ Pipe National Park right near there, with camping.