Way back in 1991, there was going to be a Total Solar Eclipse visible from the Big Island of Hawaii. I went there and shot it. However, there was no lodging available, and there were no rental cars available, so I used lightweight gear techniques to help. There is no running water on either of the two volcanoes (Mauna Kea or Mauna Loa), but I was going to need to be up pretty high on one or the other to get above the predicted cloud layers. I figured that I would need to be self-sufficient for four days maximum, so I had to carry four days worth of water. I figured on one gallon per day. Do the math, and that is about 32 pounds of water. Ten pounds of camera gear. Pack, clothing, SB, food, etc. The whole pack was 67 pounds when I rode a taxi up to the trailhead. Kicked my butt! Shot the eclipse from 12,000 feet, well above the clouds. Hit the Mauna Loa summit (almost 14,000 feet) and then descended the other side. It could not have been done without lightweight techniques.