If you use camera 3, at a certain point it becomes impossible to return to camera 1 using the keyboard. You are thrown in camera 8. This issue is the same I also experienced at Sherman Hill, so we probably should not blame Skyhook for this one. Saving the game and resuming it is a workaround to fix the issue, but this is a risky strategy for various reasons, so I do not intend to test this approach.