One of the guys I went down there with had a house. His family had been leasing it year round for a couple of decades, they all took turns going down at different times of the year. It was about half a mile from the port at Loreto, BCS, we fished there a couple weeks at a time in July a few years in a row until a hurricane wiped out the house a few years back. We would drive down (24 hour non stop drive from here) with an empty freezer in the back of the truck and park the truck in the garage when we got there, load some ice blocks into the bottom of the freezer and plug it in. We would filet the Dorado every day and put what we didn't eat or share with the neighbors into the freezer. When it was time to drive back home we duck taped the freezer closed and drove back home with enough fish for our familes and friends to enjoy for quite a long time.
The Mexicans at the many road blocks on the Baja highway only wanted a quick peek into the freezer (usually after a big smile from us, and an offer of an ice cold soda or beer, and a little cigar) and we'd be on our way. The border guards in the US were pretty rough, assuming we were bad characters because of the sealed chest, and worthy of a lengthy inspection. Except for one time, when we drove up to the border guard who was clearly very tired from a long day. He lowered his sunglasses, peered at the chest with bloodshot eyes and asked "Do I want to know what's in there?" My buddy who was driving looked at him, lowered his sunglasses and just said "No". :| The border guard didn't say a word and waved us through.