Lots of great photos - I just looked through the entire thread! I use my iphone in a waterproof case which is in the pocket of my PFD. Handy for checking weather too, especially with the frequent thunderstorms here in central Florida in the summer.
A couple pics from the Weeki Wachee river last week. A 7.5 mile spring fed river that stays 72F year round. It’s usually an obstacle course of rental kayaks but I went late on Friday afternoon and mostly had the place to myself. Kayak is a Tiderace Xceed S.