What you might do is to use the "J" function. When using J the camera will start on your airfield in pause mode. Unpause it and you will have the free camera while everything continues in real time. You can adjust the camera angle with shift+mouse etc., going low to simulate sitting in a car or something. And now you can wander around however you like. Using streets, etc. simulates driving. So you can go wherever you like, searching a wreckage of a shot down enemy etc.