I currently have a Sony DSC-H5.  It resembles a small DSLR except the lens is not interchangeable.  It is almost 9 years old.  Somewhat dated technology--only 12X zoom.  It still works as good as new and takes great pictures with the Carl Zeiss lens. F2.8-37 focal length 6-72. It is perfect for a lot of what I do.
But (there is always a but  

)  I am going on a small-ship cruise (66 passengers) in Alaska's inner coves.  There will be opportunities to hike, kayak, ride in a skiff, and view from on-deck.  I would like a camera in the same size/style I have but with more zoom.
Companies seem to have gotten into a pissing contest trying to "out-zoom" the competition to the point where zooming is slow and focus is slow and sloppy.  Users report disappointing picture quality.  
I looked at two Sony cameras with 35X and 50X zoom. Customer comments were not favorable. The less expensive camera (Sony DSC-H300) appears to be the current version of my camera but downgraded to a Sony lens and no viewfinder. It is closer to my price point so I am leaning toward it.  I need to study it more.
Any suggestions of other cameras or experience with that Sony or the DSC-HX300 or Sony H400?  I want more zoom but I do not crave the max.  What I need is a camera that will get the job done with a minimum of fuss under challenging conditions. I do not want a brick to carry while hiking.  I also do not want to risk too much money to Alaska weather.  
Thank you.