We just approached someone in the marina. Then we bartered on a price. I don’t recall the exact amount we paid. I want to say around $100 ea?
There are several other companies that can take you to "hidden beach" not just Vallarta Adventure. Just remember none of them can warranty to go the hidden beach (including vallarta adventures), it all depends on sea conditions on the day of your tour. Good luck
We made the tour with Vallarta Adventure because they are the oficial agency that can take you inside "playa escondida" (hidden beach)
It was around $125 usd per person, just make sure to mention you want to take the tour inside playa escondida when you make the reservation.
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