Another coccyx buster...I busted my butt sitting on hard ground making these paintings. Today I travel with a pack stool and an inflatable donut. Equipment is everything when working in nature. Sunscreen, water, clothing, aspirin,...etc. make the difference between being able to work 1.5 hrs or 12 hrs without fatigue. At 35, I could still work through the pain. Surrounded by the High Sierra antics of my peers made it all fun. Not a bad view for an office either.