Advantages of Drawings: Makes the viewer pay more attention to detail. Has more character than a photo. You can choose what details to include.
Advantages of Photos: Captures all the details correctly. A drawing could be anatomically incorrect. Usually includes color which a simple sketch does not.
I love artistic stuff and nature journaling is a way for me to practice drawing from the source instead of using reference images. I love nature but I hardly ever get out to enjoy it, hopefully with this new venture I will get out more. I think I'll try a combination of the various different journaling approaches. I definitely like Shayna's process of starting with the drawing first. I think I'll make my drawing larger though, cover more of the page with less written stuff. I'm not sure what I want to do with the written portion. I like the idea of including descriptive and informative details for close ups and journals focused on animals and a more poetic approach for landscapes.