On this trip, you will use a variety of focal length lenses. Plan on at a least a wide angle and a zoom in the 70-300 mm or 100-400 mm range or so. Fixed focal length telephoto lenses are great as well. Often I will use an extender if my vision for an image warrants. Wide angle zoom lenses can be useful as well. Add a tripod and maybe a remote release and you have what you will need.
You will also need to bring your laptop and your editing software for our editing sessions. I use Photoshop if you want to insure compatibility but what ever you use is okay.