Your daypack should not weigh more than 10% of your body weight AT MOST. Bear in mind that every litre of water weighs 2.2lbs, and you will be carrying a minimum of 2Ls/water at a time. You are welcome to bring your favourite snacks with you, and don’t forget sunscreen, your rain gear and any photography equipment you wish to carry. Your expedition duffel bag should not weigh more than 45lbs. This is both for your own sake when checking in at the airport, and the sake of the mules!