About 5 years ago we did WWR with Defasio on the Rio Basla. 4.5 hours (Long enough, not all day, maybe looking for wilder this time) and Sky Trek for zipline. I wondering if that's the way we should go again. We also did Hanging bridges and Tabacon Hot Springs, and walked the base of the volcano, liked all.. We'll be there March 1st. Do we need to book ahead? Staying at Arenal Parasio. Are we missing anything??