Turtle-watching in Costa Rica and Panama in April

Question

Where can I watch the turtles lay their eggs in Costa Rica and Panama in the second half of April? I am mainly interested in places that are accessible by car (4x4 is fine).

Answer 1

There are at least 2 tours that I could find that could fit your criteria:

Undiscovered Carribean

and

LeatherBack Volunteer Vacation

I am sure that you could probably get to those beaches on your own if you choose to but I think these would be better. There is actually a whole slew of tours just like those at SeeTurtles.org

EDIT

More on Turtle Watching in Costa Rica

And Even more on Turtle Watching including a map

And with the best map I could find

Answer 2

We ended up watching the leatherback turtles on the Gandoca beach. This was organized through an agency in Puero Viejo de Talamanca (I can't remember the name of the agency). I can certainly recommend this option, and after reading more about turtle watching I think it is actually get by far the highest probability of success in April.