Bocas del Toro by air or by ground?

As I have worked on the itinerary for my Panama trip, I have tried to find ways to save time by flying between some towns or flying to a town in the west and picking up a rental car.  For instance, I thought if I could fly to Bocas del Toro and then pick up a rental car I could save quite a bit of time and still see the same territory.  One of my concerns is that I don't like the idea of leaving my rental car on the mainland while spending a couple of days on the islands.  There are flights to Bocas del Toro on the commuter airlines, but no rental cars in any of the nearby mainland towns so that idea is out.

OK… what about flying to Bocas del Toro and then on to David and pick up a car there?  That is doable, but the flight from Bocas to David is around $250.00 and there is a $180.00 drop-off fee to pick up the car in David and return it in Panama City.  $430.00 is a lot of additional cost just to save a few hours. Plus, if you add in the time waiting at airports to the flight time, you really don't save that much.  When all is said and done, the savings would cost me $75.00 to $100.00 per hour, which makes the decision pretty easy.

There is one other alternative.  I can fly round-trip from my arrival airport (Tocumen International in Panama City -- PTY) to Bocas on Aeroperlas Regional (a TACA affiliate) for $234.00.  If I were to arrive at Bocas late afternoon of the 3rd and go back to PTY the morning of the 5th or 6th I could pick up a car and still explore the area from roughly Coronado to Puerto Armuelles over the next several days before returning to Panama City to check out the canal and do a one-day trip to Darien Province.

It looks like there are two reasonable choices for what I want to see and do:  1) Fly to Bocas del Toro and back and then explore the whole south coast by car or 2) Use the original plan of getting a car in Panama City and doing the whole trip on the ground.  At least my choices are getting narrowed down.  I've got less than seven weeks to get everything nailed down and I'm starting to get a bit nervous.  I did a lot of research over the weekend on lodging in Bocas and the Azuero Peninsula, I'll be sharing that information next.