I just came back from fishing the walleye runs of the Maumee River in western Ohio, I know this is not fly fishing but it shows how crowded rivers can get during popular great lake runs. The Pike and Root River of Southeast Wisconsin almost look exactly like this in October. . Infact on those river sometimes it tends to be closer especially if you hook into fish.
This picture below is from the Vermillion River in Ohio, we also went steel heading. I found this great pool where I had a steel head on but it got free so three of us over a distance of 75 yards or so were drifting flies through it.
I do not mind fishing close to people I am use to it. But I am almost use to moving to a spot near people and catching their fish. Good times!