Last time I rode on the beach, (wasn't Ocho Rios, but similar) the horses were saddled with a modified McClellan since it's lighter and doesn't take the kind of damage that a flocked saddle would. That's prob why it looks like english tack. It pretty much is, just with a higher pommel and cantle. FYI, if it's McClellan tack, make sure you're in sturdy jeans. The stirrup straps on those things can bite your legs pretty hard (yep...found out the hard way... :D)
Have fun, and hope this helps!