We just finished driving from Zihuatanejo to the US via Sonoyta.
He drove the RV with California plates, and I drove a Durango pulling a cargo trailer both with Guerrero plates.
We were both searched at Benjamin Hill, the guys were good, and I had to open the empty trailer.
At the border, we were both asked where we had come from, and what we had to declare. That was it.
In the next 50 miles, we went through two US border patrol stops. He was waved through, I was asked if I was a US citizen at the first one, and waved through the second.
The only time I have had to open the trailer was at Benjamin Hill. We both expected more, and were glad there wasn't.
Please, if you want to discuss this, watch the politics!!!!!!