First trip to C.R.- leaving in 4 days - can't wait! We know that C.R. is not a great place for snorkeling and we aren't doing much beach time. Just Manuel Antonio and a short visit to Dominical. the rest of the time will be Monteverde, Arenal, and Central Valley. Would it make any sense to bring masks and snorkels? We are traveling with carry-on only. If we want to try a little snorkeling will we be able to rent gear? or should we not even bother?