There are two governments' requirements to be met on a trip by a US citizen to Mexico, although a lot of gringos seem to overlook this fact. Locos speaks here to one and Bull the other. To avoid inconvenience you would be well advised to comply with both.
On our trip to Santa Rosalia we had it all and I mean everything....and were never asked for anything including during our re-entry to the US. We hit checkpoints galore and all they wanted were batteries and Red Bull.
DOS LOCOS, Do you know what the proper procedure is for a private boater wishing to launch from San Diego and fish Mexican waters is. I was told we just needed our mexican boat permits along with fishing permits but now my buddy is all worked up and heard we need passports now to fish south of the border. And do we need to check in upon re-entry to the US and does anybody really follow that rule . Just curious. Thanx