I'm working on documentation for our recent cruise to Mexico and Cuba with our neighbors and two of our grandchildren, but it won't be available for a while. In the meantime, you can get everything except our own personal angle by visiting David July's article, The Grateful Talk about the Light at the Mount Sutro website. David's photography and writing are both superlative. I particularly appreciate how well documented his work is, and how observant he is of detail.
Both David and his mom—our neighbor—are excellent photographers who willingly pay the penalty of lugging bulky cameras and equipment while touring. It takes much more than a good camera to make a good photographer, but nonetheless, what a difference the camera makes! Porter, Noah, and I all tried to get a photo of a toucan in a tree. Below is our best effort (Noah's photo) compared with David's. (His photo is from the Mount Sutro Gallery. License agreement here.)