Good idea, and make it so the waterway counts as drinking water and or wetland so it also fills needs and draws dinosaurs to the tour.
Additionally, to add to your idea- I was thinking something similar just yesterday but instead of the gyrosphere method, I was thinking it would be nice to have an additional transport method in the form of a ferry as an alternative to the monorail. A waterway transport that could be hidden in the jungle instead of seeing the gaudy monorail track above your untamed wilderness