Hi Gary! Prone for me at that time wasn’t an option, currents were just too strong and even the surfers uses boats to go back to the point or have to walk 15 to 25 minutes to walk around back to the initial point.
The ones that do foil usually know how to place you, but if you know how to pump to the wave you’ll better your chances too 
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I can only assume too, that as they receive more people they are getting better at towin techniques.
you can call this two guys and try to arrange prices and schedules:
Mayco = +51 981 519 141
Romario = +51 973 356 045
Not everyone with boats go with the foils, some of them prefer not too cause it put a lot of pressure and more abuse per hour on their boats.