It does seem like overkill for a main season Camino though the OP may have other uses in mind for later. I have just walked a few days on the Portugues and the Ingles using a 25 litre pack that was chosen very deliberately because it was a close...
In the circumstances where we don't have much information about the OP's intentions, I think this is the best approach, and which I would recommend to the OP.
While I agree with the general tenor of the advice provided thus far, I am curious...
Yes you want exterior pockets for water bottles and bananas. You also want a large mesh pocket for sandals and wet stuff like just put away rain gear and socks and underwear that didn’t dry during the night. Buen Camino
Yep, I totally agree with that. I bought a pack once that had a big pocket on the back and side pockets for water bottles or whatever, thinking that with the main compartment plus the exterior pockets all my stuff would fit. When I got it home...
I walked the CF last fall and used a 36L Osprey. It was plenty big and helped me from over packing. You will find many helpful resources for choosing a pack and packing lists from community members.
Buen Camino
A consideration for a smaller pack is that you will more likely be able to carry it on and not risk loss when traveling (ref @Adelina ). On a trek, many often say that they wish they had taken less. Don't pack your fears and all the "just in...
Be sure to try the packs on with the amount of weight in them that you are expecting to carry. A good equipment store will have weights suitable for doing that. As the volume rating on packs goes up, the padding and shape of the shoulder and...
My husband ordered his pack from 6 Moon Designs. They had him take measurements to ensure the fit (modular parts so you order your preference of belt, straps or vest style, etc). Then the had him fill it and walk around the park where I took...
I love my Osprey exos 48. It is bigger than absolutely necessary but an ultralight pack so still less than 3 pounds, very comfortable and adjustable, and I am able to then use it for other backpacking that requires more gear than the camino does...
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