One of my wife's big concerns before our October, 2015 camino was whether "nature would call" when we were hiking during the day. We both brought small rolls of TP in case this happened. A surprise to both of us is we could walk an entire stage - up to 7 hours or longer and never have to "pee". In hindsight, this was a sign that we were not sufficiently hydrated. I read in Sheryl Strayed's "Wild" that a hiker will be well hydrated if you have to urinate three times during your walk. So during our second camino this fall, we'll be sure to drink more water during the day. A bigger concern for both of us is that we become very constipated after a few days of hiking. Part of this was due to dehydration. We reflected on the foods we were eating the first few days of our trip. We had eaten bocadillos in Madrid and Pamplona on our way to St Jean, and a panini sandwich for dinner in St Jean. Even though we both like the baguettes, we decided to stop eating bread and change our diets so that we had tortilla espanola (without the bread), paella, olives and fruit during our camino breaks, and salad with olive oil during our pilgrim's meal each evening. Many / all of these serve as natural laxatives and we quickly became "regular" for the rest of the camino. By the way, this was not a hardship, since we loved all these foods ! !