Welcome to the seen-by-few Rocky Brook Falls in the T15-R9 area of Northern Maine.
I frequently drag the family along to the places I shoot. These trips are always a great experience for them - but not always a "happy" experience, if you know what I'm saying.
Rocky Brook Falls is beautiful and is a very fun place to play in the water (at normal summer water levels). There are deep pot holes and a variety of water depths and current speeds in which to enjoy the clear water (note that care must be taken to insure safety here).
Coming up against the enjoyment part is the water temperature which varies between cold and really cold. Cold water means warm air and direct sunlight are needed for the "happy" part to happen. And I do make the effort to keep "happy" around as life is more pleasurable for all when "happy" is with us.
Rocky Brook Falls are located in the middle of the forest approximately 16 miles from anything (including electricity and paved roads). Direct sunlight happens in the middle of the day - the "happy" time for the girls.
You are of course right in thinking that direct sunlight is not the ideal time to be photographing the falls from a landscape perspective. For the photography goal to be achieved, early-mid-morning and late-afternoon-through-nearly-dark are the best times to shoot this location. Cloudy days will also work well, but these are harder to schedule.
The plan for this clear day was to take the family to play at the falls during the direct sun and warmth of early afternoon. This time provided great scouting info for me and the girls had the great time we all wanted them to have. I then brought the girls back to camp (over an hour away including the round trip hiking and logging road driving) and returned alone for the late day shoot.
I packed about 50 lbs of gear in with me, but primarily used 5 wide angle lenses on the Canon EOS 5D Mark III. I'll share more examples from this shoot, but this sample image came from the new-at-this-time Canon EF 28mm f/2.8 IS USM Lens. I'm really liking this compact lens and its also-new sibling, the Canon EF 24mm f/2.8 IS USM Lens.
This photo was basically out-of-the-camera with the exception of a custom white balance for which I clicked on the white water just below one of the brightest locations in the frame. The Standard Picture Style with a sharpness of "2" was used (I shoot "Neutral" in-camera for a better histogram). Long exposure noise reduction was used in-camera.
A clear sky was ideal for using a manual exposure setting which I adjusted slowly as the sun set. To get the ideal exposure, I allowed a very small area of the very brightest water to go pure white - blinking on the LCD during image review.
A B+W MRC Circular Polarizer Filter, by far my most frequently used effects filter, was used to cut the reflections including those on the surface of the water. The filter also reduces the light reaching the sensor which allowed a longer exposure - creating more motion-showing blur in the water.
Interesting is that the amount of water coming over the falls fluctuates with some significance. This is normal for waterfalls in general, but more visible in smaller falls such as this one. No two pictures look exactly the same even when taken in quick succession without moving the camera. When I dialed in a composition that I liked, I would take a number of shots to gain some natural variation.
By moving in close (just outside of the strongest mist), this composition emphasizes the closest/largest area of the falls with smaller falls diminishing through the frame. I composed to reduce the details intersecting frame borders including no rocks intersecting the bottom of the frame.
I could have spent days creating new compositions in this place.