Hi again, sorry for all the sporadic questions!
What will go in or daypacks on a day to day basis? Is it ok if mine is 18 L out should I get something bigger?
You need to be able to fit your rain jacket, water bottle, camera (if you have one), notebook, pens, small hand sanitizer, hat… and whatever else you need each day. My advice is to pack the bag and see if everything fits. Then you’ll know.
No worries about the Qs too. I’m glad you’re thinking ahead about these things 🙂