Couldn't say it better myself SY.
On my first camino, i started with 14 kilo, throw a lot in the bin in Ciraqui, so I got down to the 9 kilo, fitting my weight of 95.
This year I got a little (but very nice problem), my diet has worked so now I'm 78 kilo, and will try to get a backpack < 8 kilo...