I went to Mexico this winter for some dental work, there was only a short walk across the border, so I parked on the USA side. As I was walking I was talking to a female walker and mention that I had to park because I had a weapon in the car.
She told me that last year she forgot that she had a pistol in her purse and before she crossed the border, with her car, she stoped down the road and buried the pistol in the desert sand. Upon her return, she picked up her pistol. I thought this was a funny story. I know you do not even want to chance taking a gun across any border. If you can't walk I would guess you could stop at a sheriff's or police office. I was in a court house the other day and I notice that there were several lock boxes for storing guns. This may be something to check out.
"My choices in life were
either to be a piano player in a whore house or a politician.. And to tell
the truth, there's hardly any difference!" - Harry Truman