If you are still looking for accomodations in CR/Flamingo beach area, we booked a house through the Cyberrental.com site. They offer houses as well as condos. Good luck, our first trip is in May and we can't wait.

At this point in time you cannot be picky. Semana Santa is the busiest time of the year as it is local custom for the Costa Ricans to visit the beaches. Hurry and book the first room you can or you will have to stay in the mountains (not really a bad option for that time of year) or San Jose.