So I like to walk the Camino. I first walked with my mom, then my sister, solo so many times. Here is a list of things I'd bring despite the added weight:
1) playing cards. Don't worry about chips, just use skittles. And be weary about buying decks in Spain, I mean, they are different sometimes. So much fun with friends when you are out in the middle of nowhere. Old maid and Texas hold'em are great.
2) heating coil. I stay at cheap hotels mostly and the coffee is not so readily available. So like you have this little device and you get boiling water in your cup. Throw in some instant, and I'm ready to go. I know, controversial.
Darn it I can't think of anything else worth the weight, What would you add?