Do they feed us or do I need to take my own lunch?
Do the buses have seatbelts?
Where do I leave my wallet, passport and airline ticket?
Do they provide vests or do I need to bring my own?
Should I wear a swimsuit or are the boats always dry?
Are there mosquitos or other wild animals?
Do you know the name of my guide?
Do they have guys to carry the boats into the water?
Do they mind if I bring my own cooler?
Will there be girls on the trip?
How far down the river do we go?
Are there any waterfalls?
Do we get to fish?
How long does the trip take?
How much does it cost?
Will I be back in time for Happy Hour?
Is there dry cleaning in the wilderness?
Win,
Here are a few of the results of a Google search of "white water rafting in Costa Rica". It took less than 5 seconds. You might also try taking advantage of the "search" function listed at the top of every CRT page.
http://centralamerica.com/cr/raft/index.htm
http://www.adventurecostarica.com/
http://www.riostropicales.com/
http://www.monteverdeinfo.com/rafting.htm