I just came back from 6 weeks in Nuevo Vallarta. I took down a bait casting reel and some Rapala type lures, and bought a rod down there. I fished off the beach four or five times, casting these lures, no luck.
A couple of Brits showed up one day with rods, and bait, and hooked 20 their first day.
They were using a sliding weight arrangement, a leader about 24 inches long, with a corky on the line at the hook to float the bait off the bottom. For bait they were using fresh shrimps that came from the grocery store.
I switched over to bottom fishing, and my results changed immediately.
The best thing I learned from them though, was they travelled with a golf bag. They put their fishing gear in it, and anything else they could up to the maximum bag weight. I was impressed. A whole lot better value for an extra bag charge than taking a single rod down in a tube for the same price.tree