lol -there will be lots of speculating and checking to see who hasn't posted the week of the trip!
(although if the winners have internet access in Costa Rica they could cover their tracks, providing that they don't start threads like:
"Can you identify this snake/spider/lizard that I've found in my hotel room bedroom?"
or "Advice on holidaying alone with people you've never met before"
or "I think I've drunk too much coffee. How can I get to sleep?"