There is a guy called Pedro who owns shade trees and for a small fee will allow you to park there....but ya if its HOT you enjoy they says its a dry heat....cuz after about an hour you have no more sweat to give....be sure your vehicle is in good shape, tires and mechanical going down there and NEVER carry ANY contraband of any kind because the Highway goes straight thru an inspection station complete with dogs, sniffers and detectors.....be prepared to show ID and Vehicle info....your going to the Border and its unlike most Borders/Ports its more like the wild west....and keep your valuables out of sight, vehicle locked......at all times.....
And Pedro runs outta them shade tress pretty quick after that your sitting in a parking lot, in the direct sun and its been known to get to 117 degrees pretty regular.