I used to set all my corner posts first, but a job in Bend last month showed me why that's a bad plan.
I was putting up a cedar fence on a slope, and I did my usual thing: set the two end posts, ran a string line, and started filling in. Halfway through, I realized the line was way off because the ground dropped more than I'd eyeballed. Had to pull three posts. My helper, this older guy named Ray, just shook his head and said, 'You fight the ground, you lose. Set your high point, then walk the line with a level every 8 feet before you dig anything else.' Took an extra hour to re-set, but the whole run went in straight. It seems so obvious now. How do you guys handle layout on uneven ground?