1. I was trained by a fabulous zoologist who was a colleague and friend in the Grinnell style of notebook keeping. Very formal. Very data driven. It was a method that worked great for a vertebrate museum collection. Not so much for what I wanted to do with my field notes. I was often 'too far afield' in my note taking style. What it took me many years as a field biologist to realize was that I was a nature journaler and not a museum collector. While I absolutely understand the value of those formal field notes for academic research the artist/biologist in my needed to fly a different path.
2. I loved the use of boxes with the drawings and also the approach of a drawing a day or a month spoke to me. I might like to try a combination of those styles.