Don't forget, Cahuita has an awesome NP.
From Puerto Viejo a fun cheap day is rent a bicycle and ride to Manzanillo and back, have lunch and a few beers.
Don't forget abut the Pacuare River trip, they'll pick you up or drop you off back in Alajuela, great fun and really beautiful. It will save transport costs to-from the Caribe.
Never did say what your volunteering for???????

