Gabriel:
I hacked a 1980 Columbus-tubed Trek about 14 years ago. Used it quite a bit on trips. After a while, it gets a little old turning your hotel room into a bike shop, and my solution to avoiding removing/installing the rear derailleur, coupling and decoupling the chain, etc is a Rohloff 14 speed hub. By varying the single chainring, you can be prepared for almost any terrain.
Ken Wehrenberg, Hermann, MO, USA in the midst of grape harvest