Since trekking the “O” of Torres Del Paine is really a 7 days long camping trip, you will want to carefully evaluate every item you carry with you. As a rule of thumb, you want to keep things that stay dry, keep you dry, and have a backup plan when things are not dry.
A self guided trek in Patagonia, whether you are trekking the W or the O, requires quite a bit of planning. As I mentioned in my previous post, I started making plans for our November trek of the O as early as February that year just so that I know I have all the camping spots reserved properly. Here are some major questions you need to think about if you want to trek Torres Del Paine of Chilean Patagonia without a guide.