In this video I setup a simple path using the curve tools and then attach the camera to this path.
0:08 Create a curve that will act as the camera path
0:20 Model the path using the Modelling Toolkit
0:33 Add the camera to the curve as an animated motion path
1:11 Setup viewports for animating the camera
1:30 You can also animate the twist of the camera in three dimensions
Autodesk 3D Maya free trial tutorial