My advice, based on my own experience, is to test it out. I really really didn’t want to use a bladder. Worried about cleanliness, plasticky taste, leakage. And have always used water bottles when I day hiked with a smaller pack. But when I did a couple practice hikes, I realized that a water bottle wasn’t going to work with my system. Too finicky to reach (I would be solo), I really wanted a crossbody and not a waist pack with bottle holder, etc. Thanks to people on this forum (
@trecile) I found a bladder with no plastic taste, easy to fill and clean, and doesn’t seem to leak. It works for me, and much better than when I was trying to use bottles. Depending on the day, I will have a spare bottle in a pocket for emergency. At least that’s my plan - my Camino starts this week! Everyone is different. You can take opinions but in the end you have to go with what actually works for you on the trail.