The story of the Cessna being towed from the beach in Mexico was included in the book "Over and Back". It is about the smuggling of electronics into Mexico in the 80s after Mexico enacted something like a 50% tariff on electronics imports. I loaned my book out and never got it back so this is based on recollection.
He says there were 3 Cessna 207s returning to Brownsville after a smuggling run. They were flying along the Mexican coast on the way back when one had engine failure and had to land on the beach. If it was found it would be confiscated or destroyed and the pilot, if caught, would be facing a long stay in a Mexican jail. One of the other planes flew to Brownsville and the pilot went to a hardware store, bought some strong nylon rope and flew back to where the stranded plane was. They attached the rope to the prop of the disabled plane and somehow to the seat belt restraining systen of the tow plane.
They had miles of hard packed beach and were taking off into the prevailing southeast wind. Both planes were light with little fuel and no cargo. I dont believe either pilot was experienced in glider towing but they made it to Brownsville OK and landed. I don't recall anything about cutting the rope. I believe they landed hitched together.
This is a fascinating book. These guys were flying 206/207s, Queen Airs, TBones, DC3s, C46s, etc. Always grossly overloaded, mostly at night and landing on roads and clearings hacked out of the brush with smudge pots, They navigated mostly by dead reconning with a few VORS and DMEs Much of the time they required refueling to get home so if the ground crews didn't show up or didnt bring gas they were stuck. Some of them returned home with bullet holes in their planes. Some didn't return home at because they were in Mexican jails or victims of crashes into mountains.