On my first Camino, I carried an Osprey Sirrus 24 backpack, in which everything fit fine, and there was still a little room to spare. It was only at the end of my Camino that I wished it had more capacity. On my return trip to Lisbon, where I was to catch my flight home, I had to carry the souvenirs I bought in Santiago in a separate bag. Yes, I know. I’m eating my words! Read my previous review about the said backpack being large enough. For the most part, it was perfect for my one-week Camino, but it would have been nice to be able to fit those extra items in it.