Four in my family will be traveling to and staying in Fortuna in a couple of weeks. Needing to know how much to tip the various people we will encounter such as our van driver who pick us up in San Jose, housekeepers and taxi drivers. Should I tip in colons or would dollars be more appreciated? How much is appropriate? I don't want to throw money around like an ignorant tourist (which I guess I am) but I want to be able to acknowledge good service in an appropriate way.