Camping
Base Camp
In Base Camp camping is free and the Altamirano family provides unpurified water and a wooden sign stating the altitude 4700 m. They also sell the odd beer for double the price in La Paz. This is the best place to pitch your tent if not ascending to Rock Camp right away.
Rock Camp
Camping in Rock Camp is also free. Previous campers have put great effort into the making of flat spaces, mainly of consisting of flat rocks and gravel. It's a fine place to camp, though sleeping can be a problem because of the altitude and as climbers get up at 1AM to get to the summit at sunrise. Bring all food from La Paz pasta is not recommended at this altitude, as the low boiling temperature turns it into an unappealing wheat porridge. Rock Camp is right by the glacier and water while there is acquired by melting snow.
Warning Sep 2009: some tents and gear have been stolen while their owners were ascending the summit.
lodging
The refugio Huayna Potosi, +591 2 74 00 45, at the end of Lake Zongo offers accommodation, meals. Cost of lodging is Bs. 80 per person. The Altamirano family, +591 71 55 77 37, who runs "base camp" is currently building a competing refugio, completion and pricing of which is unclear.