Is there a reasonably priced way to get a transfer from Drake Bay airport/airstrip to Sirena after all the boats leave on their day tours (which happens at around 7am)? I understand that small planes fly into Sirena and if a plane carries several passengers the cost maybe reasonable--around $50 per person (at least that's what I've been told about planes leaving from Puerto Jimenez). Does it happen in Drake Bay? What about boats? Many thanks.