Somebody just posted this link http://www.mochilasviadelaplata.com on another, German, Camino forum I am a member of. I have no idea if they are good or bad, never used them, but perhaps it is of help to you. Buen Camino! SY
Depending on when you go, you can get rid of a lot of weight by not taking things like jackets and heavy sleeping bags. However, there are not fountains every few kilometers like on the Camino Frances, so most of the weight will be water, which you should NOT go without at least 2 liters (unlike the one 8 oz bottle I carry on the Frances). This is a different type of walk altogether from the Frances. I've walked two stretches of it, and haven't yet seen anything about bag transport.