I would absolutely do the same. Get one of the apps that downloads WikiVoyage and you have a detailed guidebook for all of Europe (including phrasebooks for every language) that doubles as a camera and flashlight and fits in your pocket.
From personal experience, you'll rather want one of those: https://en.wikipedia.org/wiki/Pareo , which is essentially a big thin cotton square.
It fullfills all the functions advertised for the towel, but is far better at the critical ones (for earth-confined travel), such as doubling as clothes and a scarf, and it's far better as a rope than a normal towel.
