We are a family of 4 (kids - 11 and 13) and we have 5 nights booked at Lost Iguana, Arenal area. We are going Easter week (4/11 - 4/16, 2014) and have read that it will be very crowded. Can we arrive and book trips a day or two ahead as can be done other times of the year or should we book things now? We prefer to arrive and talk to people there before booking but don't want to get closed out. Specifically we wish to do a zip line trip (Sky Tram/Trek), a river rafting trip (Balsa), Proyecto Asis and a horseback riding trip into the waterfall (La Fortuna). can we wing it as we hope to? Anyone been there during this time period?