Something you can do as well is select the Camera and then Right Click > Duplicate to create a copy of the camera that stores the settings of the current camera.
Then it's easy to return to that later as needed.
I like to do that when I have the camera almost in a perfect position or with ideal settings but feel the need to experiment.
Better to just create a new Camera with current settings and press on with that new Camera.
Then if those changes don't work out... just delete the camera.
A bit off topic...
We can also save the Camera as a .cam (Camera) file but that doesn't particular help with animated cameras.
There are some other options that can help in those cases such as creating an empty Model to house an Action and then add a Camera to that Action.
Then that Camera is an Action Object inside of that Action which can be drag/dropped into Choreographies and even onto other Models.
Edit: Steffen also added the View Undo/Redo feature several years back that can be quite useful.