Questions on Driving to Zihua

My wife and I have driven to Ixtapa about 15 times. We used to cross through Laredo, but the last few times we crossed at the Columbia crossing just west of Laredo. That crossing was easier and we didn't have to drive through Laredo, which can be confusing if you have never been there. At times we would go through the border whenever we got there and if it was late in the day we would go back to Laredo and spend the night and leave the next morning. From Laredo to San Luis Potosi is a days drive, we would spend the night there and be in Ixtapa the next afternoon.
Because you are from Saskatchewan Nogalas is a much longer drive. You can email me if you need more information