John Pierson found a great correlation between views, and their crop regions, and section boxes, while working in Dynamo the other day.
He discovered that if you are looking at an Elevation View, its Crop Region element is the Element ID of the view, minus 1.
So if the view is 55555555, the crop region is 55555554.
In 3D views, the section box is one below the views element ID, and the crop region is 2 below.
So if the views element ID is 66666666, the section box is 66666665, and the crop region is 66666664.
That makes it pretty handy for doing things with section boxes and crop regions, since you can select them directly by element ID.