Hi Steve!
Acclimatization instructions are at the bottom of the page. It is an absolute must to prevent symptoms of AMS, a condition I've experienced on higher treks in the Himalayas.
Every group I've hiked with brought 4L of water, although 3L is usually sufficient. Many people do not feel comfortable pumping water along the trail, especially near trail camp, because of excess excrement from other hikers/campers. To each their own and pumping water is certainly a viable option (availability permitting) if you do not want to carry the weight. Appreciate the feedback!
Best,
AC
