Hi ... Depending on the amount of gear you want to bring (as bikemig says: tent, cooking gear etc.) I might use a couple of not too big panniers in the back and four bottles on the bike (3 on the frame and if possible one on the handlebars), possibly combined with a bladder water "tank" like platypus from cascadedesigns Platypus® hydration packs, hydration systems, water bottles, water treatment and wine preservation..

I have Tubus steel racks in the front and back of my bike (Thorn Sherpa) and are thoroughly content with them (solid, works) although for lighter weights I suppose an aluminum rack would do as well.

Cheers, Jesper