Taco Trucks Near Hilton Head Island, SC
I go to one on John's Island often. It parks outside of Tienda Mexicana and is called La Michoacana. They are not associated with the store but park there for lunch. They make the best Tortas. You have to ask them to press them though. I don't know why they don't press them for Americans. They also have very good tripe. The Chicharones (corn on a stick slathered in mayo) are fun too.
The owner of the grocery store speaks English very well and can give you all of the information you need. She used to own El Sol and cooks even better than the man on the truck.
3247 Maybank Hwy
Johns Island SC 29455
I wish I knew, but I love the idea. If it were me, I'd take a tour of the taco trucks as a scouting mission and pick up the one I liked most. Then I'd make an offer to secure the date to the owner. I don't hable espanol so good, so I'd bring along an interpreter, just in case. I'd also be damn sure to write a contract spelling out who does what, when they're paid, etc., just like I'd have with any other vendor. 4 days before my rehersal dinner, the restaurant we were going to have the rehersal was closed down by the city for non-payment of taxes or something. We improvised and pulled it off, but it's always better to be prepared.