If you plan to head to Sayulita via taxi directly from the PV airport (or anywhere directly from the PV airport) you can save yourself some pesos by walking the bridge from the airport over the highway and grabbing a taxi there. IIRC, it's about $35 to Sayulita; about an hour?
FWIW, I get the complaints about PV being a city/American turons, but Sunday evening paseos along the Malecon are a blast and pretty authentically "Mexican." PV=lots of fun in small doses.
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