http://en.argentina-excepcion.com/tours-argentina/tierra-fuego-fishing-tour.html

"You may practice flyfishing or regular fishing...We suggest bringing a wide variety of lures".

Besides encouraging you to bring lures, it's clear that they, too, consider flyfishing "irregular"...since you both do that or "regular fishing"

Fish on...

Todd

P.S. That's an expensive trip there, of course...a ten day tour of ten cities and something like eight rivers...but this one especially seems interesting