Thanks for all the input. I took the Zuma Tours water taxi from Jaco (actually Herradura Beach) to Montezuma and back. The service was professional and timely. They picked us up on time at the Cocal and drove us to the launch site. On the way over we spotted a whale and calf, but no dolphins. Weather was great for both trips and water was smooth. The only time I got wet was when I leaned over to get a better camera shot of the approach to Montezuma. There were about a dozen people on the boat on both legs of the trip. Montezuma is a nice quick getaway from Jaco, but bring your own girl(s) as it is a tiny little town. Hiked up to the waterfalls. One hint, there is a trail that runs parallel to the river about 10-15 meters above the river bed. It is much easier than navigating the slippery rocks along the river bed. Not knowing this, me and a buddy hiked up the river to the main falls on our own. Once there we hired a local for 10,000 colones to take us to the very top, where there are two additional waterfalls. He also promised an easier route than the river bed, which he delivered on. This guy was barefoot and scampering around the waterfalls and jungle like a billy goat. During the tricky river crossing he showed us exactly where to step and with which feet, and made it seem like a piece of cake. If anyone wants his number let me know. He also served as our personal photographer after a bit of a learning curve to operate the cameras (and a few takes on jumping off the falls). It took us about an hour to hike up the river along the river bed, but only about 15-20 minutes along his route.