Well, I can answer that last one. It's coming up on fifty years.
I used to drive by a Dairy Farm every day and after a rainstorm there was plenty of smell to go around, not to mention the air polluting methane gas!
I assume you didn't click on Photo 18:
Very Poor Planning
Woodstock was not planned very well. The promoters originally stated there were only going to be 50,000. However, they knew at least 250,000 would most likely show. Ultimately 400,000 people showed up. There were 3 toilets for every 10,000 concert goers. People began arriving days earlier, so by Friday, the first day of the festival, Woodstock had run out of food. Organizers had to ask locals for food. Members of the Monticello Jewish Community Center started making sandwiches with 200 loaves of bread, 40 pounds of meat and two gallons of pickles. Food was also airlifted in from a nearby air force base.
Waaayy back when I was a Texas college student I had a roommate who was actually at Woodstock when he was a small child.
His parents were grad students at Syracuse and were into the folk music of the period.
All he remembered was the awful smell and the dirty hippie that dropped his pants and crapped on the ground next to him. And that he never wanted to go in the first place and missed Saturday cartoons.
He and his sister were at the medic area setup by the National Guard after that and they had priority to be evacuated.
Don’t forget, that long awful movie was the ‘best’ of the musical performances. There was a lot of silence and awful bands that no one ever heard of that filled those days that never made the film.
It truly was a disaster area like Katrina or Sandy despite the hype.
“How long did the stench last?”
Reports say three years.
That was one of the problems, they did not have many and the planning for the event was terribly poor.