I had hoped that when I said "drive there for the day" that it would be a clear indication that Mexico was not your final destination, it was a temporary stop o

I had hoped that when I said "drive there for the day" that it would be a clear indication that Mexico was not your final destination, it was a temporary stop on your way to your final destination to avoid being flagged by US commercial airlines, but apparently not. As others have pointed out, one can simply drive into Mexico or Canada for a day trip quite easily. After that you could hop on a plane there.