Oh yeah, I almost forgot. I get motion sickness using the D-pad to move the camera up so frequently. That's also why I can't do that tour, haha.
The Diving Tours are pretty frustrating. I usually have trouble getting creatures to spawn or they end up going past the barrier. The Firefly Hunt is pretty fun, though! You should try it. I found it best to stick near the river. It's annoying when they fly in the middle of the river, and the depth perception is pretty weird since your only hints as to where the fireflies are is their shadow and their 2D glow, so you'll probably swing and miss frequently, but it's pretty easy to do otherwise and quite relaxing.