I was all set to take my son to italy the end of January and then thought of costa rica. all tour packages i've looked at were too $$-can we do it ourselves? arenal area then rain forests? do we rent a car to get to the coast? suggestions anyone? we've got about a week for this and would love all suggestions. i'm pretty active and fit though don't think i'd do any class 3 rapids..can i do hotels individually through TA recommendations in 2 or so places or do I really need to go with a tour like serendipity?