You might find this article interesting: 9 Things That Happen When You Carry A Sketchbook With You Nonstop!
However, I offer one piece of advice: I’d suggest that you carry a smaller sketchbook than the one shown in the photo, say 4” x 6” in size. Pocket Sketching Notebooks
It will easily fit into a pocket or purse and will attract less notice from onlookers, who often ask to see what you are drawing. That is, unless you want to make some new friends! There is nothing that beats someone drawing to attract an audience.
~ Betty Edwards, 2/24/2016