Don't Try and Shake Everyone's Hand at Base Camp
We stayed with Climbing the Seven Summits at base camp, and they were beyond welcoming. They gave us a tour of their camp, showed us the oxygen tanks they were going to use on the summit, and introduced us to a handful of this year's climbers. While we were so excited to be there and meet the people who were attempting to summit Mount Everest, our Sherpas warned us not to offer to shake everyone's hand. Because the climbers live at base camp for two months and need to stay healthy, they don't want to catch any colds or germs from trekkers, so don't be offended if you get a fist bump in stead of a handshake.