I'm the former park engineer at Glen Canyon National Recreation Area, the home of Lake Powell and Horseshoe Bend. AMA.
I worked on engineering projects in and around Lake Powell, a well-known recreation site that attracted (pre-COVID) over two million visitors per year.
I should caveat my answers by saying that I'm no longer employed by the National Park Service and my answers reflect my personal views and experiences, not the official positions of NPS.
[EDIT: since some people have been commenting on it, here's some more pics from yours truly!]