Bring a warm sleeping bag and a good tent. Night temperatures in winter drops to -15ºC or even lower. Good boots are necessary for the descent from Rock Camp. Try to remember exactly which way you took and which turns you made going up, as it's harder to find your way going down and you might end up with a couple of metres of rock climbing ahead of you if taking the wrong path not a desirable prospect with a heavy backpack. In Base Camp, make sure your food is kept sheep proof. In Rock Camp, make sure your food is kept mice proof.
fees/permits
Bring copies of passport or remember your document's number, as there is a police check at the turnoff to Chacaltaya. Police ask for Bs. 2. Another checkpoint is 5 km before Zongo Pass. Drivers are held for five minutes by police and are sometimes charged Bs. 5. If you are not keen on organizing the trip yourself, go to an authorized operator.Ex. Topas Bolivia (http://www.topas.bo/climb...)